#include<iostream>
#include<cstdio>
#include<cstring>
#include<algorithm>
#include<cmath>
using namespace std;
int main()
{
int num,sum=0;
cin>>num;
while(num>=10){
sum=sum+num%10;
num=num/10;
}
sum+=num;
cout<<sum;
return 0;
}
CCF认证 201512-1:数位之和(C++)
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转载自blog.csdn.net/weixin_44652687/article/details/104717197
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