问一个POJ3299的问题，这是我看到的别人的答案：http://blog.csdn.net/lyy289065406/article/details/6642582

#include<iostream>  
#include<math.h>  
#include<string>  
#include<iomanip>  
using namespace std;  
int main(void)  
{  
    char alpha;  
    double t,d,h;  
    int i;  
    for(;;)  
    {  
        t=d=h=200;    //三个参数的范围默认都是在-100 ~ 100  
        for(i=0;i<2;i++)  
        {  
            cin>>alpha;  
            if(alpha=='E')  
                return 0;  
            else if(alpha=='T')  
                cin>>t;  
            else if(alpha=='D')  
                cin>>d;  
            else if(alpha=='H')  
                cin>>h;  
        }  
        if(h==200)  
            h=t+0.5555*(6.11*exp(5417.7530*(1/273.16-1/(d+273.16)))-10);  
        else if(t==200)  
            t=h-0.5555*(6.11*exp(5417.7530*(1/273.16-1/(d+273.16)))-10);  
        else if(d==200)  
            d=1/((1/273.16)-((log((((h-t)/0.5555)+10.0)/6.11))/5417.7530))-273.16;  
        cout<<setprecision(1)<<fixed<<"T "<<t<<" D "<<d<<" H "<<h<<endl;  
    }  
    return 0;  
}