C / C++ / MFC

#include<windows.h>
#include<stdio.h>
#include<stdlib.h>
#include<stdio.h>
#include<time.h>
#include<fstream>
#include<string>
#include<codigo.txt>

int escolha_cod(double saldo,int escolha)
{

int i=0,linha=0,j=0,aux=0;
char vec[2];
using namespace std;

string line;
  ifstream myfile ("codigo.txt");

if (myfile.is_open())
{
	 for(i=0;i<10;i++)
    {	

		getline(myfile,line);
	  
		const char *c_line;
		strncpy(vec,line.c_str(),3);
	
		aux=atoi(&vec[0]);
			
		if(aux==escolha)
		{linha=i;
		i=10;}
	 }
myfile.close();
}return 47;
}

int main()
{int var;
var=escolha_cod(10,12);
printf("%d",var);
getchar();
return 0;}

GatoFedorento47 wrote:

sorry! its the first time im writing here..

GatoFedorento47 wrote:

i think now is just the way u asked..

GatoFedorento47 wrote:

so anyone can give me ideias on how to put this right.

GatoFedorento47 wrote:

strncpy(vec,line.c_str(),3);

GatoFedorento47 wrote:

aux=atoi(&vec[0]);

aux = atoi(vec);

GatoFedorento47 wrote:

ifstream myfile ("codigo.txt");

GatoFedorento47 wrote:

...but i dont understand...

GatoFedorento47 wrote:

...everybody uses it!

DavidCrow wrote:

The likely cause is the aforementioned call to strncpy(), which is stepping over part of the return value on the stack.

GatoFedorento47 wrote:

i believe the function cant get access to the file in question because if i put the return after this piece of code it gives me something completely different from 47

int escolha_cod(double saldo,int escolha)
{
    FILE *codigo;
    int i=0,linha=0,j=0,aux=0;
    char vec[2];
    using namespace std;
 
    string line;
    ifstream myfile ("codigo.txt");
 
    if (myfile.is_open())
        return 47; 
 
    {
        for(i=0;i<10;i++)
        { 
            getline(myfile,line);
 
            const char *c_line;
            strncpy(vec,line.c_str(),3);
 
            aux=atoi(&vec[0]);
 
            if(aux==escolha)
            {
                linha=i;
                i=10;
            }
        }
 
        myfile.close();
    }
     
    return 47;
}

if (myfile.is_open())<br />
        {return 47; 

GatoFedorento47 wrote:

myfile.is_open())

GatoFedorento47 wrote:

...but now is working!

GatoFedorento47 wrote:

...but when i run my actual program made in VB when i call the function it keeps returning 0 again

DavidCrow wrote:

I suspect it is a relative .vs absolute path issue.

GatoFedorento47 wrote:

didn.t understand, what do you mean?

GatoFedorento47 wrote:

that VB doesn't know where is the file?

int escolha_cod( double balance, int choice )
{
    std::ifstream myfile("c:\\codigo.txt");
    std::vector<int> numbers;
 
    std::copy(std::istream_iterator<int>(myfile), std::istream_iterator<int>(), std::back_inserter(numbers));
    myfile.close();
 
    std::vector<int>::iterator it = std::find(numbers.begin(), numbers.end(), choice);
 
    int ret = -1;
    if (it != numbers.end())
        ret = (int) (it - numbers.begin()) + 1;
 
    return ret;
}
 
void main( void )
{
    int var = escolha_cod(10.0, 1500);
    printf("%d",var);
}

C. Tam wrote:

CSize sc(rc_static.Width(), rc_static.Height());
bm_copy.CreateCompatibleBitmap(&cdc_source, sc.cx, sc.cy);

CDC MemDc;<br />
MemDc.CreatecompatibleDC(&cdc_source);<br />
CBitmap *pOld = MemDc.SelectObject( &bm_copy );<br />
MemDc.BitBlt( 0, 0, sc.cx, sc.cy, &cdc_source, 0, 0, SRCCOPY );<br />
MemDc.SelectObject( pOld );