北大ACM(POJ1003-Hangover)

 1 Memory: 220K        Time: 0MS
 2 Language: C++        Result: Accepted
 3 
 4 #include <iostream>
 5 using namespace std;
 6 int calcCard(float f)
 7 {
 8     float sum=0;
 9     int i=2;
10     for(;sum<f;i++)
11     {
12         sum+=1.0f/i;
13     }
14     return i-2;
15 }
16 int main()
17 {
18     float len[100]={0};
19     int i=0,j=0;
20     do{
21         cin>>len[i];
22     }while(len[i++]!=0);
23     i--;
24     for(;j<i;j++)
25     {
26         cout<<calcCard(len[j])<<" card(s)"<<endl;
27     }
28     return 0;
29 }