> msdn上关于noskipws有这样一段代码
> 
> #include <iostream>
> #include <string>
> 
> int main() {
>    using namespace std;   
>    string s1, s2, s3;
>    cout << "Enter three strings: ";
>    cin >> noskipws >> s1 >> s2 >> s3;
>    cout << "." << s1  << "." << endl;
>    cout << "." << s2 << "." << endl;
>    cout << "." << s3 << "." << endl;   
> }
> 
> 输入1 2 3
> 输出
> .1.
> ..
> ..
> 
> 不知道noskipws的用法。。。