Question

How to write a string to binary file in C

Answer 1

#include <stdio.h>
#include <string.h>
 
int main(void)
{
    FILE *fp;
    char s[15] = "C Programming";

    fp = fopen("d:\\data.bin","wb");
    if (!fp) {fputs("File open error",stderr); return 1;}

    fwrite(s, sizeof(char), strlen(s), fp);

    fclose(fp);
 
    return 0;
}

/*
run: (the content of d:\\date.bin)

C Programming

*/

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