请教一个《C Primer Plus》上一个代码的问题

/*对用户输入的整数求和*/
#include <stdio.h>

int main(void)
{
	long num;
	long sum = 0L; 
	int status;

	printf("Please enter an integer to be summed ");
	printf("(q to quit): ");
	status = scanf_s("%1d", &num);  	

	while (status == 1) 
	{		
		sum = sum + num;
		printf("Please enter next integer (q to quit): ");
		status = scanf_s("%1d", &num);
	}

	printf("Those integers sum to %1d.\n", sum);
	return 0;
}

为什么我的运行结果是不对的啊😂 变成了 1+2+2+3=8

while 语句里面还循环了两次