How to pass a 2D array by pointer in C?

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I am learning C and am having trouble passing the pointer of a 2D array to another function that then prints the 2D array. Any help would be appreciated.

#include <stdio.h>

#define col 204
#define col_p 2
#define rows_p 1020

int codecheck(int col,int col_p,int rows_p,int **h,int x[])
{	int i,j,m,f; //flags
	int sum = 0;
	int y[col];
	
	for (i=0;i<col;i++)
	y[i]=0;
	m=1;
	f=-1;
	for(i=0;i<rows_p;)							 
	{			
		for(j=0;j<rows_p;j++)
		{
			if(H[j][0]==m)
			{		
				y[m]=y[m] + x[h[j][1]-1];
					f++;
			}
		}
		y[m]=y[m]%2;
		m=m+1;
		i=f+1;
	}

	for (i = 0; i < col; ++i) 
		{
			sum =sum+ y[i];
		}
	if (sum == 0) 
		{
			return 1;
		}
	else
		{	
			return -1;
		}
				
}

int codesum (int y[],int col)
{
    int sum=0;
    for(int i=0;i<col;i++)
        sum+=y[i];
    //cout<< "sum="<< sum<<endl;
    if(sum>0)
        return 0;
    else
        return 1;
}

void SPADecoder(int rows_p, double LLR[], int *h, double LLR_ret[], double L_ch[],  double L_dec[], int y[], int z, int col)
{
    double temp;
	int col_p;
    int i,j,k;
    for(i=0;i<rows_p;i++)
    {
        temp=1;
        for(j=0;j<rows_p;j++)
        {
            if(j!=i && h[j][0]==h[i][0])
            {
                temp=temp * tanhf(LLR[j]/2);
            }
        }
								
								
        LLR_ret[i] = log((1 + temp)/(1 - temp));     // lower and upper bounding the LLR
								
        if(LLR_ret[i] > 40)
        {
            LLR_ret[i]=40;
        }
        else if(LLR_ret[i]<-40)
        {
            LLR_ret[i]=-40;
        }
        
    }
    
    for(i=0;i<col;i++)							// L_dec array used to decide the value of each bit of codeword here it is initalized to LLr value received from channel
    {
        L_dec[i]=L_ch[i];
    }
    
    
    for(i=1;i<col+1;i++)						// LLR values received by the variable nodes are added and stored in L_dec for decision making
    {
        for(j=0;j<rows_p;j++)
        {
            if(h[j][1]==i)
            {
                L_dec[i-1]=L_dec[i-1]+LLR_ret[j];
            }
            
        }
        
        if(L_dec[i-1]<=0)						// decision about the bit values of the received codeword is done her and stored in Y.
        {
            y[i-1]=1;
        }
        else
        {
            y[i-1]=0;
        }
        
    }
    
    
    //z = codesum(y,col);
    z=codecheck(col, col_p,rows_p,h,y); // checking whether the decoded codeword is all zero or not
    
    if(z==1)								// if decoded perfectly exit the deoding loop
    {
        return ;
    }
    // updating LLR values on variable nodes side for each variable and check node
    for(i=0;i<rows_p;i++)
    {
        temp=0;
        for(j=0;j<rows_p;j++)
        {
            if(j!=i && h[j][1]==h[i][1])
            {
                temp=temp + LLR_ret[j];
                k=h[i][1];
                
            }
        }
        LLR[i] = temp+L_ch[k-1];
    }

}

int main()
{
    
    
	// flags and counters
	int z,i,j,N,k,ber_count,looping,t,sum;
    float d=1;
	float rate=0.5;
	int rows_p,col_p;
	int col;			// iterations gives the maximum number of time the decoder is run for each value of SNR

	double var,snr;
	double temp; 								/
	
    float y[col],x[col],noise[col];  // "x" will be used as a codeword and "y" is received codeword.
    double L_ch[col],L_dec[col];    //holds LLR values given by the channel
	double LLR[rows_p],LLR_ret[rows_p];					//hold updated LLR values at variable node and check node respectively

   int  ret,row=0;

    
int h[rows_p][col_p]={{1,1},{1,18},{1,27},{1,82},{1,102},{1,103},{1,130},{1,177},{1,190},{1,203},{2,2},{2,15},{2,75},{2,80},{2,86},{2,104},{2,121},{2,141},{2,144},{2,191},{3,3},{3,31},{3,32},{3,42},{3,101},{3,105},{3,153},{3,159},{3,178},{3,199},{4,4},{4,37},{4,71},{4,75},{4,85},{4,106},{4,111},{4,114},{4,127},{4,164},{5,5},{5,17},{5,42},{5,72},{5,87},{5,107},{5,141},{5,158},{5,193},{5,197},{6,4},{6,6},{6,17},{6,78},{6,102},{6,108},{6,162},{6,165},{6,167},{6,174},{7,7},{7,23},{7,73},{7,80},{7,83},{7,109},{7,118},{7,168},{7,177},{7,178},{8,8},{8,33},{8,37},{8,73},{8,100},{8,110},{8,156},{8,173},{8,192},{8,197},{9,9},{9,40},{9,41},{9,88},{9,92},{9,103},{9,111},{9,173},{9,181},{9,199},{10,10},{10,14},{10,23},{10,53},{10,93},{10,107},{10,112},{10,137},{10,167},{10,175},{11,11},{11,19},{11,26},{11,28},{11,88},{11,110},{11,113},{11,116},{11,170},{11,191},{12,1},{12,12},{12,25},{12,86},{12,97},{12,108},{12,114},{12,124},{12,161},{12,192},{13,4},{13,13},{13,33},{13,34},{13,50},{13,115},{13,137},{13,140},{13,146},{13,160},{14,14},{14,31},{14,40},{14,58},{14,95},{14,116},{14,121},{14,166},{14,174},{14,203},{15,15},{15,68},{15,70},{15,87},{15,101},{15,109},{15,113},{15,117},{15,165},{15,180},{16,4},{16,16},{16,59},{16,67},{16,92},{16,118},{16,125},{16,131},{16,138},{16,151},{17,15},{17,17},{17,44},{17,71},{17,73},{17,119},{17,161},{17,190},{17,194},{17,198},{18,18},{18,47},{18,62},{18,85},{18,93},{18,120},{18,122},{18,125},{18,146},{18,181},{19,19},{19,22},{19,23},{19,37},{19,57},{19,121},{19,126},{19,130},{19,131},{19,143},{20,1},{20,20},{20,50},{20,51},{20,99},{20,106},{20,122},{20,169},{20,179},{20,200},{21,21},{21,32},{21,62},{21,72},{21,98},{21,123},{21,126},{21,154},{21,168},{21,204},{22,22},{22,31},{22,44},{22,89},{22,98},{22,124},{22,141},{22,160},{22,169},{22,176},{23,23},{23,32},{23,61},{23,65},{23,99},{23,125},{23,132},{23,133},{23,147},{23,152},{24,16},{24,24},{24,42},{24,73},{24,77},{24,126},{24,142},{24,145},{24,146},{24,147},{25,5},{25,24},{25,25},{25,55},{25,67},{25,127},{25,133},{25,165},{25,178},{25,185},{26,10},{26,26},{26,27},{26,40},{26,85},{26,128},{26,147},{26,155},{26,160},{26,200},{27,22},{27,27},{27,42},{27,50},{27,74},{27,108},{27,129},{27,154},{27,170},{27,195},{28,2},{28,28},{28,63},{28,67},{28,94},{28,130},{28,150},{28,171},{28,187},{28,192},{29,29},{29,48},{29,69},{29,79},{29,90},{29,116},{29,131},{29,159},{29,176},{29,200},{30,7},{30,30},{30,53},{30,58},{30,94},{30,127},{30,132},{30,140},{30,162},{30,189},{31,29},{31,31},{31,64},{31,77},{31,94},{31,117},{31,133},{31,167},{31,183},{31,190},{32,20},{32,30},{32,32},{32,74},{32,78},{32,115},{32,134},{32,151},{32,181},{32,194},{33,11},{33,33},{33,47},{33,76},{33,81},{33,109},{33,135},{33,154},{33,155},{33,179},{34,2},{34,7},{34,34},{34,71},{34,76},{34,136},{34,138},{34,159},{34,182},{34,183},{35,27},{35,29},{35,35},{35,60},{35,86},{35,123},{35,137},{35,149},{35,166},{35,189},{36,17},{36,35},{36,36},{36,48},{36,100},{36,138},{36,139},{36,146},{36,163},{36,168},{37,5},{37,34},{37,37},{37,38},{37,69},{37,117},{37,139},{37,145},{37,169},{37,203},{38,38},{38,56},{38,76},{38,92},{38,101},{38,106},{38,123},{38,140},{38,161},{38,170},{39,39},{39,41},{39,60},{39,76},{39,78},{39,125},{39,141},{39,142},{39,175},{39,198},{40,2},{40,35},{40,40},{40,43},{40,93},{40,114},{40,135},{40,142},{40,148},{40,158},{41,1},{41,2},{41,13},{41,41},{41,59},{41,109},{41,119},{41,132},{41,143},{41,157},{42,11},{42,42},{42,43},{42,92},{42,95},{42,115},{42,117},{42,144},{42,156},{42,204},{43,7},{43,9},{43,43},{43,45},{43,56},{43,122},{43,145},{43,192},{43,194},{43,201},{44,10},{44,44},{44,75},{44,83},{44,95},{44,110},{44,135},{44,146},{44,157},{44,180},{45,45},{45,63},{45,79},{45,81},{45,97},{45,127},{45,139},{45,147},{45,148},{45,195},{46,34},{46,46},{46,61},{46,66},{46,77},{46,105},{46,144},{46,148},{46,197},{46,201},{47,14},{47,20},{47,46},{47,47},{47,83},{47,124},{47,128},{47,132},{47,149},{47,159},{48,8},{48,13},{48,26},{48,48},{48,62},{48,149},{48,150},{48,174},{48,193},{48,195},{49,15},{49,21},{49,25},{49,49},{49,51},{49,145},{49,149},{49,151},{49,177},{49,188},{50,8},{50,49},{50,50},{50,54},{50,89},{50,105},{50,126},{50,152},{50,164},{50,165},{51,43},{51,51},{51,66},{51,68},{51,91},{51,131},{51,133},{51,153},{51,187},{51,189},{52,1},{52,39},{52,45},{52,52},{52,54},{52,110},{52,140},{52,150},{52,154},{52,163},{53,8},{53,53},{53,60},{53,64},{53,90},{53,138},{53,155},{53,157},{53,194},{53,204},{54,12},{54,28},{54,54},{54,60},{54,82},{54,112},{54,139},{54,151},{54,156},{54,183},{55,3},{55,17},{55,37},{55,55},{55,99},{55,112},{55,148},{55,157},{55,172},{55,189},{56,20},{56,31},{56,56},{56,80},{56,91},{56,152},{56,156},{56,158},{56,162},{56,180},{57,28},{57,57},{57,66},{57,81},{57,89},{57,134},{57,137},{57,159},{57,172},{57,196},{58,5},{58,58},{58,70},{58,78},{58,91},{58,118},{58,149},{58,154},{58,160},{58,201},{59,18},{59,24},{59,59},{59,88},{59,96},{59,150},{59,152},{59,161},{59,179},{59,183},{60,21},{60,38},{60,55},{60,59},{60,60},{60,162},{60,176},{60,187},{60,190},{60,197},{61,61},{61,69},{61,74},{61,93},{61,101},{61,111},{61,128},{61,163},{61,193},{61,196},{62,6},{62,7},{62,35},{62,62},{62,96},{62,103},{62,113},{62,129},{62,164},{62,200},{63,16},{63,27},{63,44},{63,63},{63,88},{63,121},{63,134},{63,165},{63,175},{63,188},{64,4},{64,26},{64,64},{64,79},{64,84},{64,119},{64,134},{64,136},{64,166},{64,168},{65,12},{65,13},{65,52},{65,57},{65,65},{65,106},{65,138},{65,142},{65,167},{65,176},{66,24},{66,30},{66,52},{66,66},{66,102},{66,112},{66,117},{66,122},{66,135},{66,168},{67,6},{67,57},{67,67},{67,85},{67,97},{67,140},{67,169},{67,182},{67,184},{67,186},{68,6},{68,58},{68,68},{68,71},{68,90},{68,134},{68,143},{68,145},{68,152},{68,170},{69,54},{69,57},{69,59},{69,69},{69,77},{69,103},{69,104},{69,114},{69,136},{69,171},{70,19},{70,24},{70,56},{70,70},{70,100},{70,105},{70,114},{70,128},{70,129},{70,172},{71,14},{71,52},{71,63},{71,70},{71,71},{71,120},{71,169},{71,173},{71,178},{71,196},{72,11},{72,25},{72,39},{72,66},{72,72},{72,120},{72,130},{72,132},{72,174},{72,199},{73,48},{73,49},{73,64},{73,73},{73,98},{73,111},{73,175},{73,179},{73,201},{73,202},{74,9},{74,15},{74,58},{74,74},{74,84},{74,107},{74,120},{74,135},{74,164},{74,176},{75,28},{75,41},{75,70},{75,75},{75,96},{75,133},{75,155},{75,166},{75,177},{75,202},{76,26},{76,45},{76,65},{76,76},{76,94},{76,144},{76,158},{76,172},{76,178},{76,203},{77,10},{77,13},{77,77},{77,84},{77,87},{77,127},{77,151},{77,163},{77,179},{77,191},{78,49},{78,55},{78,65},{78,78},{78,90},{78,122},{78,130},{78,139},{78,180},{78,182},{79,33},{79,43},{79,67},{79,79},{79,99},{79,123},{79,141},{79,181},{79,188},{79,202},{80,18},{80,19},{80,35},{80,46},{80,80},{80,153},{80,167},{80,182},{80,188},{80,193},{81,9},{81,16},{81,36},{81,55},{81,81},{81,143},{81,160},{81,183},{81,186},{81,191},{82,10},{82,11},{82,79},{82,82},{82,96},{82,108},{82,111},{82,126},{82,172},{82,184},{83,12},{83,36},{83,69},{83,83},{83,87},{83,148},{83,174},{83,185},{83,202},{83,204},{84,45},{84,47},{84,48},{84,75},{84,84},{84,108},{84,123},{84,142},{84,153},{84,186},{85,9},{85,46},{85,53},{85,54},{85,85},{85,115},{85,121},{85,129},{85,177},{85,187},{86,22},{86,64},{86,83},{86,86},{86,91},{86,107},{86,116},{86,171},{86,188},{86,199},{87,8},{87,22},{87,61},{87,81},{87,87},{87,104},{87,120},{87,182},{87,189},{87,198},{88,32},{88,33},{88,39},{88,51},{88,88},{88,129},{88,143},{88,171},{88,180},{88,190},{89,3},{89,21},{89,52},{89,89},{89,100},{89,103},{89,109},{89,115},{89,125},{89,191},{90,20},{90,40},{90,44},{90,61},{90,90},{90,118},{90,137},{90,153},{90,184},{90,192},{91,6},{91,23},{91,29},{91,84},{91,91},{91,144},{91,155},{91,173},{91,185},{91,193},{92,14},{92,49},{92,72},{92,92},{92,102},{92,147},{92,171},{92,185},{92,186},{92,194},{93,5},{93,21},{93,29},{93,65},{93,93},{93,105},{93,110},{93,119},{93,184},{93,195},{94,39},{94,80},{94,82},{94,94},{94,98},{94,107},{94,113},{94,131},{94,166},{94,196},{95,30},{95,47},{95,50},{95,63},{95,95},{95,104},{95,118},{95,161},{95,163},{95,197},{96,25},{96,34},{96,56},{96,68},{96,96},{96,116},{96,181},{96,186},{96,196},{96,198},{97,36},{97,38},{97,46},{97,89},{97,97},{97,113},{97,136},{97,150},{97,157},{97,199},{98,3},{98,12},{98,18},{98,30},{98,98},{98,136},{98,170},{98,187},{98,198},{98,200},{99,53},{99,62},{99,74},{99,97},{99,99},{99,104},{99,119},{99,156},{99,185},{99,201},{100,16},{100,68},{100,82},{100,95},{100,100},{100,106}};

                        for(looping=0;looping<decoderIterations;looping++)
						{
							
                            SPADecoder(rows_p, LLR, h, LLR_ret, L_ch, L_dec, y, z, col  );
							printf("%d\t", y[looping]);
						}
return 0;
	
}

Compilation Errors

prog.c:5:13: error: expected ';', ',' or ')' before numeric constant
 #define col 204
             ^
prog.c:9:19: note: in expansion of macro 'col'
 int codecheck(int col,int col_p,int rows_p,int **h,int x[])
                   ^
prog.c:5:13: error: expected ';', ',' or ')' before numeric constant
 #define col 204
             ^
prog.c:48:26: note: in expansion of macro 'col'
 int codesum (int y[],int col)
                          ^
prog.c:7:16: error: expected ';', ',' or ')' before numeric constant
 #define rows_p 1020
                ^
prog.c:60:21: note: in expansion of macro 'rows_p'
 void SPADecoder(int rows_p, double LLR[], int *h, double LLR_ret[], double L_ch[],  double L_dec[], int y[], int z, int col)
                     ^
prog.c: In function 'main':
prog.c:7:16: error: expected identifier or '(' before numeric constant
 #define rows_p 1020
                ^
prog.c:152:6: note: in expansion of macro 'rows_p'
  int rows_p,col_p;
      ^
prog.c:5:13: error: expected identifier or '(' before numeric constant
 #define col 204
             ^
prog.c:153:6: note: in expansion of macro 'col'
  int col,maxTransmissions=4000,decoderIterations=20,maxErrors=100,errorsAccumulated=0;   // iterations gives the maximum number of time the decoder is run for each value of SNR
      ^
prog.c:158:23: error: expected expression before '/' token
  double temp;         /
                       ^
prog.c:178:47: error: 'decoderIterations' undeclared (first use in this function)
                         for(looping=0;looping<decoderIterations;looping++)
                                               ^
prog.c:178:47: note: each undeclared identifier is reported only once for each function it appears in
prog.c:181:29: warning: implicit declaration of function 'SPADecoder' [-Wimplicit-function-declaration]
                             SPADecoder(rows_p, LLR, h, LLR_ret, L_ch, L_dec, y, z, col  );
                             ^
prog.c:181:78: error: 'y' undeclared (first use in this function)
                             SPADecoder(rows_p, LLR, h, LLR_ret, L_ch, L_dec, y, z, col  );
                                                                              ^

What I have tried:

I am learning C and am having trouble passing the pointer of a 2D array to another function that then prints the 2D array. Any help would be appreciated

Posted 30-Aug-17 20:03pm

Member 13261175

Updated 30-Aug-17 21:16pm

Add a Solution

3 solutions

Solution 2

Here's one way :

C++

const size_t      Dim1 = 250;
const size_t      Dim2 = 512;

typedef int       RowArray[Dim1];
typedef RowArray  CheckMatrix[Dim2];

int ProcessMatrix( RowArray matrix[] )
{
// process the matrix here
}

int Function()
{
   CheckMatrix matrix;
   ProcessMatrix( matrix );
}

Posted 30-Aug-17 21:06pm

Rick York

Updated 30-Aug-17 21:07pm

v2

Comments

Member 13261175 31-Aug-17 3:11am

I don`t want to include separate function for Matrix.

lukeer 31-Aug-17 3:20am

Of course you do.
I'm citing your question: "[...]passing the pointer of a 2D array to another function that then prints the 2D array.[...]"
You want another function that operates on the 2D array.
Operate == print
2D array == matrix

Rick York 31-Aug-17 11:10am

You asked how to pass a "pointer of a 2D array to another function." This is how.

Solution 3

Based on Griff's suggestion, I fixed all compilation errors but the undeclared identifier decoderIterations (that's up to you).
Still there are warnings (again it's up to you to fix them) and, possibly, there may be logical (runtime) errors.

C

#include <stdio.h>
#include <math.h>
 
#define COL 204
#define COL_P 2
#define ROWS_P 1020
 
int codecheck(int col,int col_p,int rows_p,int (*h)[2],int x[])
{	int i,j,m,f; //flags
	int sum = 0;
	int y[col];
	
	for (i=0;i<col;i++)
	y[i]=0;
	m=1;
	f=-1;
	for(i=0;i<rows_p;)							 
	{			
		for(j=0;j<rows_p;j++)
		{
			if(h[j][0]==m)
			{		
				y[m]=y[m] + x[h[j][1]-1];
					f++;
			}
		}
		y[m]=y[m]%2;
		m=m+1;
		i=f+1;
	}
 
	for (i = 0; i < col; ++i) 
		{
			sum =sum+ y[i];
		}
	if (sum == 0) 
		{
			return 1;
		}
	else
		{	
			return -1;
		}
				
}
 
int codesum (int y[],int col)
{
    int sum=0;
    for(int i=0;i<col;i++)
        sum+=y[i];
    //cout<< "sum="<< sum<<endl;
    if(sum>0)
        return 0;
    else
        return 1;
}
 
void SPADecoder(int rows_p, double LLR[], int (*h)[2], double LLR_ret[], double L_ch[],  double L_dec[], int y[], int z, int col)
{
    double temp;
	int col_p;
    int i,j,k;
    for(i=0;i<rows_p;i++)
    {
        temp=1;
        for(j=0;j<rows_p;j++)
        {
            if(j!=i && h[j][0]==h[i][0])
            {
                temp=temp * tanhf(LLR[j]/2);
            }
        }
								
								
        LLR_ret[i] = log((1 + temp)/(1 - temp));     // lower and upper bounding the LLR
								
        if(LLR_ret[i] > 40)
        {
            LLR_ret[i]=40;
        }
        else if(LLR_ret[i]<-40)
        {
            LLR_ret[i]=-40;
        }
        
    }
    
    for(i=0;i<col;i++)							// L_dec array used to decide the value of each bit of codeword here it is initalized to LLr value received from channel
    {
        L_dec[i]=L_ch[i];
    }
    
    
    for(i=1;i<col+1;i++)						// LLR values received by the variable nodes are added and stored in L_dec for decision making
    {
        for(j=0;j<rows_p;j++)
        {
            if(h[j][1]==i)
            {
                L_dec[i-1]=L_dec[i-1]+LLR_ret[j];
            }
            
        }
        
        if(L_dec[i-1]<=0)						// decision about the bit values of the received codeword is done her and stored in Y.
        {
            y[i-1]=1;
        }
        else
        {
            y[i-1]=0;
        }
        
    }
    
    
    //z = codesum(y,col);
    z=codecheck(col, col_p,rows_p,h,y); // checking whether the decoded codeword is all zero or not
    
    if(z==1)								// if decoded perfectly exit the deoding loop
    {
        return ;
    }
    // updating LLR values on variable nodes side for each variable and check node
    for(i=0;i<rows_p;i++)
    {
        temp=0;
        for(j=0;j<rows_p;j++)
        {
            if(j!=i && h[j][1]==h[i][1])
            {
                temp=temp + LLR_ret[j];
                k=h[i][1];
                
            }
        }
        LLR[i] = temp+L_ch[k-1];
    }
 
}
 
int main()
{
    
    
	// flags and counters
	int z,i,j,N,k,ber_count,looping,t,sum;
    float d=1;
	float rate=0.5;
	int rows_p,col_p;
	int col;			// iterations gives the maximum number of time the decoder is run for each value of SNR
 
	double var,snr;
	double temp; 								
	
    float y[COL],x[COL],noise[COL];  // "x" will be used as a codeword and "y" is received codeword.
    double L_ch[COL],L_dec[COL];    //holds LLR values given by the channel
	double LLR[ROWS_P],LLR_ret[ROWS_P];					//hold updated LLR values at variable node and check node respectively
 
   int  ret,row=0;
 
    
int h[ROWS_P][COL_P]={{1,1},{1,18},{1,27},{1,82},{1,102},{1,103},{1,130},{1,177},{1,190},{1,203},{2,2},{2,15},{2,75},{2,80},{2,86},{2,104},{2,121},{2,141},{2,144},{2,191},{3,3},{3,31},{3,32},{3,42},{3,101},{3,105},{3,153},{3,159},{3,178},{3,199},{4,4},{4,37},{4,71},{4,75},{4,85},{4,106},{4,111},{4,114},{4,127},{4,164},{5,5},{5,17},{5,42},{5,72},{5,87},{5,107},{5,141},{5,158},{5,193},{5,197},{6,4},{6,6},{6,17},{6,78},{6,102},{6,108},{6,162},{6,165},{6,167},{6,174},{7,7},{7,23},{7,73},{7,80},{7,83},{7,109},{7,118},{7,168},{7,177},{7,178},{8,8},{8,33},{8,37},{8,73},{8,100},{8,110},{8,156},{8,173},{8,192},{8,197},{9,9},{9,40},{9,41},{9,88},{9,92},{9,103},{9,111},{9,173},{9,181},{9,199},{10,10},{10,14},{10,23},{10,53},{10,93},{10,107},{10,112},{10,137},{10,167},{10,175},{11,11},{11,19},{11,26},{11,28},{11,88},{11,110},{11,113},{11,116},{11,170},{11,191},{12,1},{12,12},{12,25},{12,86},{12,97},{12,108},{12,114},{12,124},{12,161},{12,192},{13,4},{13,13},{13,33},{13,34},{13,50},{13,115},{13,137},{13,140},{13,146},{13,160},{14,14},{14,31},{14,40},{14,58},{14,95},{14,116},{14,121},{14,166},{14,174},{14,203},{15,15},{15,68},{15,70},{15,87},{15,101},{15,109},{15,113},{15,117},{15,165},{15,180},{16,4},{16,16},{16,59},{16,67},{16,92},{16,118},{16,125},{16,131},{16,138},{16,151},{17,15},{17,17},{17,44},{17,71},{17,73},{17,119},{17,161},{17,190},{17,194},{17,198},{18,18},{18,47},{18,62},{18,85},{18,93},{18,120},{18,122},{18,125},{18,146},{18,181},{19,19},{19,22},{19,23},{19,37},{19,57},{19,121},{19,126},{19,130},{19,131},{19,143},{20,1},{20,20},{20,50},{20,51},{20,99},{20,106},{20,122},{20,169},{20,179},{20,200},{21,21},{21,32},{21,62},{21,72},{21,98},{21,123},{21,126},{21,154},{21,168},{21,204},{22,22},{22,31},{22,44},{22,89},{22,98},{22,124},{22,141},{22,160},{22,169},{22,176},{23,23},{23,32},{23,61},{23,65},{23,99},{23,125},{23,132},{23,133},{23,147},{23,152},{24,16},{24,24},{24,42},{24,73},{24,77},{24,126},{24,142},{24,145},{24,146},{24,147},{25,5},{25,24},{25,25},{25,55},{25,67},{25,127},{25,133},{25,165},{25,178},{25,185},{26,10},{26,26},{26,27},{26,40},{26,85},{26,128},{26,147},{26,155},{26,160},{26,200},{27,22},{27,27},{27,42},{27,50},{27,74},{27,108},{27,129},{27,154},{27,170},{27,195},{28,2},{28,28},{28,63},{28,67},{28,94},{28,130},{28,150},{28,171},{28,187},{28,192},{29,29},{29,48},{29,69},{29,79},{29,90},{29,116},{29,131},{29,159},{29,176},{29,200},{30,7},{30,30},{30,53},{30,58},{30,94},{30,127},{30,132},{30,140},{30,162},{30,189},{31,29},{31,31},{31,64},{31,77},{31,94},{31,117},{31,133},{31,167},{31,183},{31,190},{32,20},{32,30},{32,32},{32,74},{32,78},{32,115},{32,134},{32,151},{32,181},{32,194},{33,11},{33,33},{33,47},{33,76},{33,81},{33,109},{33,135},{33,154},{33,155},{33,179},{34,2},{34,7},{34,34},{34,71},{34,76},{34,136},{34,138},{34,159},{34,182},{34,183},{35,27},{35,29},{35,35},{35,60},{35,86},{35,123},{35,137},{35,149},{35,166},{35,189},{36,17},{36,35},{36,36},{36,48},{36,100},{36,138},{36,139},{36,146},{36,163},{36,168},{37,5},{37,34},{37,37},{37,38},{37,69},{37,117},{37,139},{37,145},{37,169},{37,203},{38,38},{38,56},{38,76},{38,92},{38,101},{38,106},{38,123},{38,140},{38,161},{38,170},{39,39},{39,41},{39,60},{39,76},{39,78},{39,125},{39,141},{39,142},{39,175},{39,198},{40,2},{40,35},{40,40},{40,43},{40,93},{40,114},{40,135},{40,142},{40,148},{40,158},{41,1},{41,2},{41,13},{41,41},{41,59},{41,109},{41,119},{41,132},{41,143},{41,157},{42,11},{42,42},{42,43},{42,92},{42,95},{42,115},{42,117},{42,144},{42,156},{42,204},{43,7},{43,9},{43,43},{43,45},{43,56},{43,122},{43,145},{43,192},{43,194},{43,201},{44,10},{44,44},{44,75},{44,83},{44,95},{44,110},{44,135},{44,146},{44,157},{44,180},{45,45},{45,63},{45,79},{45,81},{45,97},{45,127},{45,139},{45,147},{45,148},{45,195},{46,34},{46,46},{46,61},{46,66},{46,77},{46,105},{46,144},{46,148},{46,197},{46,201},{47,14},{47,20},{47,46},{47,47},{47,83},{47,124},{47,128},{47,132},{47,149},{47,159},{48,8},{48,13},{48,26},{48,48},{48,62},{48,149},{48,150},{48,174},{48,193},{48,195},{49,15},{49,21},{49,25},{49,49},{49,51},{49,145},{49,149},{49,151},{49,177},{49,188},{50,8},{50,49},{50,50},{50,54},{50,89},{50,105},{50,126},{50,152},{50,164},{50,165},{51,43},{51,51},{51,66},{51,68},{51,91},{51,131},{51,133},{51,153},{51,187},{51,189},{52,1},{52,39},{52,45},{52,52},{52,54},{52,110},{52,140},{52,150},{52,154},{52,163},{53,8},{53,53},{53,60},{53,64},{53,90},{53,138},{53,155},{53,157},{53,194},{53,204},{54,12},{54,28},{54,54},{54,60},{54,82},{54,112},{54,139},{54,151},{54,156},{54,183},{55,3},{55,17},{55,37},{55,55},{55,99},{55,112},{55,148},{55,157},{55,172},{55,189},{56,20},{56,31},{56,56},{56,80},{56,91},{56,152},{56,156},{56,158},{56,162},{56,180},{57,28},{57,57},{57,66},{57,81},{57,89},{57,134},{57,137},{57,159},{57,172},{57,196},{58,5},{58,58},{58,70},{58,78},{58,91},{58,118},{58,149},{58,154},{58,160},{58,201},{59,18},{59,24},{59,59},{59,88},{59,96},{59,150},{59,152},{59,161},{59,179},{59,183},{60,21},{60,38},{60,55},{60,59},{60,60},{60,162},{60,176},{60,187},{60,190},{60,197},{61,61},{61,69},{61,74},{61,93},{61,101},{61,111},{61,128},{61,163},{61,193},{61,196},{62,6},{62,7},{62,35},{62,62},{62,96},{62,103},{62,113},{62,129},{62,164},{62,200},{63,16},{63,27},{63,44},{63,63},{63,88},{63,121},{63,134},{63,165},{63,175},{63,188},{64,4},{64,26},{64,64},{64,79},{64,84},{64,119},{64,134},{64,136},{64,166},{64,168},{65,12},{65,13},{65,52},{65,57},{65,65},{65,106},{65,138},{65,142},{65,167},{65,176},{66,24},{66,30},{66,52},{66,66},{66,102},{66,112},{66,117},{66,122},{66,135},{66,168},{67,6},{67,57},{67,67},{67,85},{67,97},{67,140},{67,169},{67,182},{67,184},{67,186},{68,6},{68,58},{68,68},{68,71},{68,90},{68,134},{68,143},{68,145},{68,152},{68,170},{69,54},{69,57},{69,59},{69,69},{69,77},{69,103},{69,104},{69,114},{69,136},{69,171},{70,19},{70,24},{70,56},{70,70},{70,100},{70,105},{70,114},{70,128},{70,129},{70,172},{71,14},{71,52},{71,63},{71,70},{71,71},{71,120},{71,169},{71,173},{71,178},{71,196},{72,11},{72,25},{72,39},{72,66},{72,72},{72,120},{72,130},{72,132},{72,174},{72,199},{73,48},{73,49},{73,64},{73,73},{73,98},{73,111},{73,175},{73,179},{73,201},{73,202},{74,9},{74,15},{74,58},{74,74},{74,84},{74,107},{74,120},{74,135},{74,164},{74,176},{75,28},{75,41},{75,70},{75,75},{75,96},{75,133},{75,155},{75,166},{75,177},{75,202},{76,26},{76,45},{76,65},{76,76},{76,94},{76,144},{76,158},{76,172},{76,178},{76,203},{77,10},{77,13},{77,77},{77,84},{77,87},{77,127},{77,151},{77,163},{77,179},{77,191},{78,49},{78,55},{78,65},{78,78},{78,90},{78,122},{78,130},{78,139},{78,180},{78,182},{79,33},{79,43},{79,67},{79,79},{79,99},{79,123},{79,141},{79,181},{79,188},{79,202},{80,18},{80,19},{80,35},{80,46},{80,80},{80,153},{80,167},{80,182},{80,188},{80,193},{81,9},{81,16},{81,36},{81,55},{81,81},{81,143},{81,160},{81,183},{81,186},{81,191},{82,10},{82,11},{82,79},{82,82},{82,96},{82,108},{82,111},{82,126},{82,172},{82,184},{83,12},{83,36},{83,69},{83,83},{83,87},{83,148},{83,174},{83,185},{83,202},{83,204},{84,45},{84,47},{84,48},{84,75},{84,84},{84,108},{84,123},{84,142},{84,153},{84,186},{85,9},{85,46},{85,53},{85,54},{85,85},{85,115},{85,121},{85,129},{85,177},{85,187},{86,22},{86,64},{86,83},{86,86},{86,91},{86,107},{86,116},{86,171},{86,188},{86,199},{87,8},{87,22},{87,61},{87,81},{87,87},{87,104},{87,120},{87,182},{87,189},{87,198},{88,32},{88,33},{88,39},{88,51},{88,88},{88,129},{88,143},{88,171},{88,180},{88,190},{89,3},{89,21},{89,52},{89,89},{89,100},{89,103},{89,109},{89,115},{89,125},{89,191},{90,20},{90,40},{90,44},{90,61},{90,90},{90,118},{90,137},{90,153},{90,184},{90,192},{91,6},{91,23},{91,29},{91,84},{91,91},{91,144},{91,155},{91,173},{91,185},{91,193},{92,14},{92,49},{92,72},{92,92},{92,102},{92,147},{92,171},{92,185},{92,186},{92,194},{93,5},{93,21},{93,29},{93,65},{93,93},{93,105},{93,110},{93,119},{93,184},{93,195},{94,39},{94,80},{94,82},{94,94},{94,98},{94,107},{94,113},{94,131},{94,166},{94,196},{95,30},{95,47},{95,50},{95,63},{95,95},{95,104},{95,118},{95,161},{95,163},{95,197},{96,25},{96,34},{96,56},{96,68},{96,96},{96,116},{96,181},{96,186},{96,196},{96,198},{97,36},{97,38},{97,46},{97,89},{97,97},{97,113},{97,136},{97,150},{97,157},{97,199},{98,3},{98,12},{98,18},{98,30},{98,98},{98,136},{98,170},{98,187},{98,198},{98,200},{99,53},{99,62},{99,74},{99,97},{99,99},{99,104},{99,119},{99,156},{99,185},{99,201},{100,16},{100,68},{100,82},{100,95},{100,100},{100,106}};
 
                        for(looping=0;looping<decoderIterations;looping++)
						{
							
                            SPADecoder(rows_p, LLR, h, LLR_ret, L_ch, L_dec, y, z, col  );
							printf("%d\t", y[looping]);
						}
return 0;
	
}

[update]
Fixed function declarations.
[/update]

Posted 30-Aug-17 21:15pm

CPallini

Updated 30-Aug-17 22:02pm

v2

Comments

Member 13261175 31-Aug-17 3:26am

@ CPallini
decoderIterations error fixed. Then after running the above corrected codes. I am getting below

Compilation Errors

prog.c:59:54: error: expected ';', ',' or ')' before 'h'
void SPADecoder(int rows_p, double LLR[], int (*)[2] h, double LLR_ret[], double L_ch[], double L_dec[], int y[], int z, int col)
^
prog.c: In function 'main':
prog.c:169:29: warning: implicit declaration of function 'SPADecoder' [-Wimplicit-function-declaration]
SPADecoder(rows_p, LLR, h, LLR_ret, L_ch, L_dec, y, z, col );
^
prog.c:170:15: warning: format '%d' expects argument of type 'int', but argument 2 has type 'double' [-Wformat=]
printf("%d\t", y[looping]);
^

CPallini 31-Aug-17 4:03am

I fixed the function declarations, it should compile now. Pay attention, there are important warnings.

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OriginalGriff · Accepted Answer · 2017-08-30T20:23:00

Start by getting rid of your errors: you created a #define called col and then used col as a parameter name:

#define col 204
...
int codecheck(int col,int col_p,int rows_p,int **h,int x[])

Because #define substitution is a preprocessing operation (i.e. it's done before the compiler gets started on the code) that means teh compiler ends up looking at this:

int codecheck(int 204,int 2,int 1020,int **h,int x[])

Which are not legal variable names and you get loads of errors.
This is one of the reasons that #define names are normally ALL UPPERCASE, so they can be easily identified and not mistaken for variables.