while문(3)

//제어변수 number를 키보드로부터 입력받아 초기화한다.

#include <stdio.h>

int main()
{
 int number;
 long sum=0;

 printf("Please enter an integer <0 to quit> : ");
 scanf("%d", &number);
 while(number !=0)
 {
  sum+=number;
  printf("Please enter an integer <0 to quit> : ");
  scanf("%d", &number);
 }
 printf("The sum of number is %ld.\n", sum);
 return 0;
}

결과
Please enter an integer <0 to quit> :  1
Please enter an integer <0 to quit> :  2
Please enter an integer <0 to quit> :  3
Please enter an integer <0 to quit> :  4
Please enter an integer <0 to quit> :  0 <-0을 입력하면 while문 종료
The sum of number is 10.