#include<stdio.h>
int DigitSum(int x)
{int sum = 0, g=0;if(x>0){g = x % 10;sum += g;return sum+DigitSum(x/10);}return 0;
}
int main()
{int x;printf("请输入需要计算的数\n");scanf("%d",&x);int y=DigitSum(x);printf("%d",y);
}