char name[64];

int main(int argc, char*argv[]) {
   char message[64];
   FILE *fp;

   setvbuf(stdout, NULL, _IONBF, 0);

   printf("Enter your name: ");
   fgets(name, 63, stdin);

   printf("Enter your message: ");
   gets(message);

   fp = fopen("messages.txt", "a");
   if(fp == NULL) {
     printf("Whoops, message not delivered ;(\n");
     return 1;
   }
   fprintf(fp, "Message from %s: %s\n", name, message);
   fclose(fp);

   printf("Your message has been sent to admin, bye!\n");
   return 0;
}