ZOJ1045&&1048

两道简单题，此外，1049有网友给出的计算公式是 Z=3.14*(x*x+y*y)/100.0+1.0，可惜我不明白其原理

ZOJ1045 HangOver

#include<iostream>
using namespace std;
int main()
{
    double target,num,sum;
    while(cin>>target&&target!=0.00)
    {
        sum = 0.0f;
        num = 2;
        while(sum<target)
        {
            sum += 1.0/num;
            num++;
        }
        cout<<num-2<<" card(s)"<<endl;
    }
    return 0;
}

 ZOJ1048 Financial Management

#include<iostream>
using namespace std;
int main()
{
    double sum = 0.0f,average = 0.0f,num;
    for (int i=0;i<12;++i)
    {
        cin>>num;
        sum += num;
    }
    average = sum/12.0f;
    cout<<"$"<<average<<endl;
    return 0;
}