C Primer Plus®, Third Edition

Chapter 12

1. It should have #include <stdio.h> for its file definitions. It should declare fp a file pointer: FILE *fp;. The function fopen() requires a mode: fopen("gelatin", "w") or perhaps the "a" mode. The order of the arguments to fputs() should be reversed. For clarity, the output string should have a newline because fputs() doesn't add one automatically. The fclose() function requires a file pointer, not a filename: fclose(fp);. Here is a corrected version:

   #include <stdio.h〉
   int main(void)
   {
      FILE * fp;
      int k;
      fp = fopen("gelatin", "w");
      for (k = 0; k < 30; k++)
          fputs("Nanette eats gelatin.\n", fp);
      fclose(fp);
      return 0;
   }
   

2. It would open, if possible, the file whose name is the first command-line argument, and it would display onscreen each ...