Question

C++ 循环while(cin>>s)结束的问题

#include<iostream>#include<string>using namespace std;int main(){ string s1,s2; cout<<"Enter s1(Ctrl+Z to end):"<<endl; while(cin>>s1) cout<<s1<<endl; return 0;}程序的目的就是读入一个字符串，然后输出，直到输入Ctrl+Z结束。这个没有问题，但是如果改成下面的代码，就会不执行第二个循环：#include<iostream>#include<string>using namespace std;int main(){ string s1,s2; cout<<"Enter s1(Ctrl+Z to end):"<<endl; while(cin>>s1) cout<<s1<<endl; cout<<"Enter s2(Ctrl+Z to end):"<<endl; while(cin>>s2) cout<<s2<<endl; return 0;}望高手不吝赐教，谢谢。

Answer 1

改用getline()函数：
#include<iostream>
#include<string>
using namespace std;

int main()
{
string s1,s2;

cout<<"Enter s1:"<<endl;
getline(cin,s1);
cout<<s1<<endl;

getchar();

cout<<"Enter s2:"<<endl;
getline(cin,s2);
cout<<s2<<endl;

return 0;
}
//结果：