POJ3299Humidex

转载请注明出处：優YoU http://user.qzone.qq.com/289065406/blog/1299074845

提示：纯粹的数学公式，连推导公式都可以省了= =

 1 //Memory   Time 
 2 //240K      0MS 
 3 
 4 #include<iostream>
 5 #include<math.h>
 6 #include<string>
 7 #include<iomanip>
 8 using namespace std;
 9 int main(void)
10 {
11     char alpha;
12     double t,d,h;
13     int i;
14     for(;;)
15     {
16         t=d=h=200;    //三个参数的范围默认都是在-100 ~ 100
17         for(i=0;i<2;i++)
18         {
19             cin>>alpha;
20             if(alpha=='E')
21                 return 0;
22             else if(alpha=='T')
23                 cin>>t;
24             else if(alpha=='D')
25                 cin>>d;
26             else if(alpha=='H')
27                 cin>>h;
28         }
29         if(h==200)
30             h=t+0.5555*(6.11*exp(5417.7530*(1/273.16-1/(d+273.16)))-10);
31         else if(t==200)
32             t=h-0.5555*(6.11*exp(5417.7530*(1/273.16-1/(d+273.16)))-10);
33         else if(d==200)
34             d=1/((1/273.16)-((log((((h-t)/0.5555)+10.0)/6.11))/5417.7530))-273.16;
35         cout<<setprecision(1)<<fixed<<"T "<<t<<" D "<<d<<" H "<<h<<endl;
36     }
37     return 0;
38 }