Question

How to write struct with numbers to binary file in C

Answer 1

#include <stdio.h>
 
struct rectangle
{
    int x, y;
}; 
 
int main(int argc, char **argv) 
{ 
    FILE *f;
    struct rectangle rec;
 
    f = fopen("d:\\data.bin", "wb");
    if (!f)
    {
        printf("Unable to open d:\\data.bin");
        return 1;
    }
    for (int i = 1; i <= 10; i++)
    {
        rec.x = i * 2;
        rec.y = i;
        fwrite(&rec, sizeof(struct rectangle), 1, f);
    }
            
     
    fclose(f);
     
    return(0);
}
 
/*

run:
 

*/

 

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