Uva 10591 - Happy Number

Problem C	Happy Number
Time Limit	1 Second

解题思路：WA了我一次，没看Sample直接敲了！！忽略了第一个要输入的Case数量

#include<iostream>
#include<cstdio>
#include<set>
using namespace std;
set<int>num;
bool Traverse(int cur){
    int temp = cur, sum = 0;
    for(; temp != 0;){
        sum += (temp%10)*(temp%10);
        temp /= 10;
    }
    if(sum == 1) return true;
    else if(num.find(sum) == num.end()){
        num.insert(sum);
        return Traverse(sum);
    }
    else return false;
}

int main(){
    #ifndef ONLINE_JUDGE
    freopen("input.txt", "r", stdin);
    #endif
    int n, T;
    cin>>T;
    for(int i=1; i<=T; ++i){
        cin>>n;
        num.clear();
        num.insert(n);
        if(Traverse(n)) cout<<"Case #"<<i<<": "<<n<<" is a Happy number."<<endl;
        else cout<<"Case #"<<i<<": "<<n<<" is an Unhappy number."<<endl;
    }
    return 0;
}