line_counter.c

   1 #include <stdio.h>
   2
   3 main()
   4 {
   5         int c, nl;
   6         nl = 0;
   7         while((c = getchar()) != EOF)
   8                 if( c == '\n')
   9                         ++nl;
  10         printf("%d\n", nl);
  11 }