此解可AC(超简单)

解题思路:

注意事项:

参考代码:

#include<stdio.h>

int main()

{

int c, sum;

unsigned int N;

while (scanf("%u", &N) != EOF)

{

sum = 0;

while (N)

{

c = N % 10;

N /= 10;

sum += c;

}

printf("%d\n", sum);

}

}