#include <stdio.h> #include <stdlib.h> #include <string.h> int main(void) { char str[80]; FILE *fp; if((fp = fopen("TEST", "w"))==NULL) { printf("Cannot open file.\n"); exit(1); } do { printf("Enter a string (CR to quit):\n"); gets(str); strcat(str, "\n"); /* add a newline */ fputs(str, fp); } while(*str!='\n'); return 0; }