1 #include <stdio.h>
   2 #include <stdlib.h>
   3 
   4 static int sum(int n)
   5 {
   6         int i, result = 0;
   7 
   8         for (i = 1; i <= n; ++i)
   9                 result += i;
  10         return result;
  11 }
  12 
  13 int main(int argc, char **argv)
  14 {
  15         printf("%d\n", sum(5));
  16         printf("%d\n", sum(100));
  17         return 0;
  18 }
  19 
  20 /*
  21  * check-name: sum from 1 to n
  22  * check-command: sparsei $file
  23  *
  24  * check-output-start
  25 15
  26 5050
  27  * check-output-end
  28  */