题解 | #数位之和#

#include<stdio.h>
int main()
{
	int n = 0;
	scanf("%d", &n); 
	int sum = 0; 
	while (n!=0)
	{
		sum += n % 10;  
		n /= 10; 
	}
	  
	printf("%d", sum);  
	return 0; 
}