How do function calling

void Renglon(){
    int etapa;
  int  z=0;

      for(i=0; i <= N-1; i++) {

         for(n=0; n< N; n++){
          x[n] = MC[i][n];
                
                  init_bro();
                  init_W();
                 ordena_ent();
         
                    for(etapa=1; etapa <= nbits; etapa++){
                    combina(etapa);
                    }
         
         }
                  z=z+1;
      printf("\n\n Salida = (%d) ", z); 
        for(m=0; m<N; m++)
           printf("\n x[%d] = %.2f + %.2f j", m, creal(mcombina[m][3]), cimag(mcombina[m][3]));
         //printf("\n x[%d,%d] = %.2f + %.2f j", m,i, creal(MC[m][7]), cimag(MC[m][7]));
  }
}
void Columna(){
    int etapa;
    int g = 0;
    int z=0;

        for(n=0; n <=64 ; n+=8, j=1+j)
        {
            for(i=0; i <= N-1; i++){
                 x[i] = (double)data[n+i][0] + data[n+i][1]*I;
         
                 init_bro();
                 init_W();
                 ordena_ent();
                   
            }   
        for(etapa=1; etapa <= nbits; etapa++){
            combina(etapa);
        }
          
                 for(i=0; i <= N-1; i++) {
	            MC[i][j] = mcombina[i][3];
                //MT[i][j]=MC[i][1];
             g=g+1;
                }
 
  if(g==8){ 
      Renglon();   
  }
}
 }
      

int main(int argc, char const *argv[])
{
	/* code */
	if (argc < 3){
		printf("Please specify the CSV file as an input.\n");
		exit(0);
	}

	char row     = atoi(argv[1]);
	char col     = atoi(argv[2]);
	char fname[256];	strcpy(fname, argv[3]);

	data = (double **)malloc(row * sizeof(double *));
	for (int i = 0; i < row; ++i){
		data[i] = (double *)malloc(col * sizeof(double));
	}
 int etapa;
	read_csv(row, col, fname, data);
    Columna();
    Renglon();
return 0;
    }