2.9BSD - /usr/src/cmd/learn/lcount.c

   1: #include "stdio.h"
   2: 
   3: main()  /* count lines in something */
   4: {
   5:     register n, c;
   6: 
   7:     n = 0;
   8:     while ((c = getchar()) != EOF)
   9:         if (c == '\n')
  10:             n++;
  11:     printf("%d\n", n);
  12: }

Defined functions