Online JudgeProblem SetAuthorsOnline ContestsUser
Web Board
Home Page
F.A.Qs
Statistical Charts
Problems
Submit Problem
Online Status
Prob.ID:
Register
Update your info
Authors ranklist
Current Contest
Past Contests
Scheduled Contests
Award Contest
User ID:
Password:
  Register

冒号那个是做什么用的 为什么得写上那句才能成功?if(a[0]==':') 这句 、、

Posted by weilai6236 at 2012-11-13 20:54:41 on Problem 3077
In Reply To:把它当字符串做了 Posted by:1004115224 at 2012-08-16 16:45:44
> #include<iostream>
> #include<string>
> using namespace std;
> int main()
> {
>     string a;
>     int n;
>     cin>>n;
>     while(n--)
>     {
>         cin>>a;
>         int l=a.length();
>         if(l==1)cout<<a<<endl;
>         else
>         {
>             for(int i=l-1;i>0;i--)
>             {
>                 if(a[i]>='5')
>                 {
>                     a[i]='0';
>                     a[i-1]=a[i-1]+1;
>                 }
>                 else a[i]='0';
>             }
>             if(a[0]==':')
>             {
>                 a[0]='0';
>                 cout<<1<<a<<endl;
>             }
>             else cout<<a<<endl;
>         }
>     }
>     return 0;
> }

Followed by:

Post your reply here:
User ID:
Password:
Title:

Content:

Home Page   Go Back  To top


All Rights Reserved 2003-2013 Ying Fuchen,Xu Pengcheng,Xie Di
Any problem, Please Contact Administrator