#include<stdio.h>

int main()
{
	printf("Enter a number to sum:\n");
	printf("Enter \"0\" if you want to quit.\n");

	long sum,num;
	scanf("%ld",&num);

	while(num!=0)
	{
		sum += num;
		printf("Enter next number:\n");
		printf("Enter \"0\" if you want to quit.\n");
		scanf("%ld",&num);
	}
	
	printf("The sum result is:%ld",sum);

	return 0;
}
 

功能：持續輸入數字，將其全部累加，直到輸入“0”退出，輸出累加結果。