Question

How to write numbers to file in C

Answer 1

#include <stdio.h>
#include <string.h>
 
int main(void) {
    char buffer_out[32];
    FILE *out = fopen("data.dat", "w");
    if (out == NULL) {
        return 1;
    }
     
    int a = 234, b = 987;
    snprintf(buffer_out, 32, "%d %d\n", a, b);
    size_t bytes_wrote = fwrite(buffer_out, sizeof(int), strlen(buffer_out), out);
    fclose(out);
     
    if (bytes_wrote != strlen(buffer_out)) {
        return 1;
    }
 
    return 0;
}
 
 
/*
data.dat
 
// 234 987  @            ‰@     
 
*/
 
 
 
/*
run:
 
 
*/

 

Cleaner teeth, healthier you!
Get The Secret to a Bright and Healthy Smile