writebin.c
public c v1 · immutable#include <stdio.h>typedef struct _user_info { int id; char name[20];} user_info;int main(){ user_info user; FILE *fp; user.id = 20; strncpy (user.name, "yangh", 5); user.name[5] = '\0'; fp = fopen("data", "wb"); fwrite (&user, sizeof(user_info), 1, fp); fclose (fp); return 1;}