Thread: Converting a program from C++ to C

So, theres this program which works for C++, but im having problems when i try to convert it for C, below is the program with the changes that i made to try to make it work for C, and the way it was before is shown with ''//....". When i try to compile it i get the message "cannot convert 'const char*' to 'FILE*' for argument '1' to 'int fscanf(FILE*, const char*,...)' " at line 24, which is "fscanf("%d", &M[j][k]);" what should i do??

Code:

#include <stdio.h>
#include <stdlib.h>

unsigned int N[6][3]=
{
    1, 0, 2,
    1, 2, 0,
    0, 1, 2,
    0, 2, 1,
    2, 1, 0,
    2, 0, 1
};

int main(void)
{
    unsigned int M[3][3], j=0, k=0, p=0, menor=~0, soma=0, i=0;
    FILE *arq;          //fstream arq("garrafas.eco",ios::in);
    arq = fopen("garrafas.eco", "r");
    
    while(!feof(arq))// while(!arq.eof())
    {
       for(j=0; j<3; j++)
          for(k=0; k<3; k++)
             fscanf("%d", &M[j][k]);          //arq >> M[j][k];    
       for(i=0; i<6; i++)
       {     
          for(j=0; j<3; j++)
             for(k=0; k<3; k++)
                if(k!=N[i][j]) soma+=M[j][k];      
          if(soma<=menor)
          {
             menor=soma;      
             p=i;             
          }
       }       
       for(j=0; j<3; j++)
       printf("%c", N[p][j]);            //cout << "MVB"[N[p][j]];
       printf("%d", menor);            //cout << " " << menor << endl;
    }
    system("PAUSE");
    return 0;
}

Originally Posted by laserlight

You forgot to provide arq as an argument to fscanf. By the way, using feof to control a loop like that risks looping one more time than you intend because the eof condition is only set on a failed read.

hey thanks for the reply but how could i do it? how do i provide arq as an argument to fscanf? sorry im just new to programmimg and i had lots of help to make this program. And wont feof finish the loop when it reaches the end of the file that is being read? the file that will be read is supposed to have 9 numbers in it and that's it.