#include <stdio.h>

int main(void)
{
  int  number, sum;

  printf("This program sums a series of integers.\n");

  printf("Enter integers (0 to terminate):  ");

  scanf("%d", &number);

  while ( number != 0 )  {
	sum = sum + number;

	scanf("%d", &number);
  }

  printf("The sum of all entered numbers is: %d\n", sum);
  
  return 0;
}