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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 、、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;
> }
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