Question

How to read binary file a few times from the beginning in C

Answer 1

#include <stdio.h>
 
void read_binary_file(FILE *f); 
 
int main(int argc, char **argv) 
{ 
    FILE *f;

    f = fopen("d:\\data.bin", "rb");
    if (!f)
    {
        printf("Unable to open d:\\data.bin");
        return 1;
    }
    
    read_binary_file(f);
    printf("\n");
    
    fseek(f, 0, SEEK_SET);
    
    read_binary_file(f);
    printf("\n");
     
    fclose(f);
    
    return(0);
}

void read_binary_file(FILE *f)
{
    for (int i = 1; i <= 10; i++)
    {
        int n;
        fread(&n, sizeof(int), 1, f);
        printf("%d ", n);
    }
}
 
/*

run:

1 2 3 4 5 6 7 8 9 10
1 2 3 4 5 6 7 8 9 10

*/

 

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