/*-------------------------------------------------------------------*/
/* sum.c                                                             */
/*-------------------------------------------------------------------*/

#include <stdio.h>

static int i;
static int iFirst;
static int iSecond;
static int iSum = 0;

int main(int argc, char *argv[])

/* Read two integers from stdin, and write to stdout the sum of all 
   integers between the two. */

{
   printf("Enter an integer:  ");
   scanf("%d", &iFirst);

   printf("Enter another integer that is greater than the first:  ");
   scanf("%d", &iSecond);

   for (i = iFirst; i <= iSecond; ++i)
      iSum += i;

   printf("The sum of all integers between the two is %d.\n", iSum);
   return 0;
}