[求助]提问--为什么这个程序我要击两次回车才会出现结果呢
#include <iostream>
#include <string>
int main()
{ using namespace std;
string str;
std::cout<<"Please input your name:\n";
getline(cin,str);
std::cout<<"Hello,"<<str<<"!!\n";
}
#include <iostream>
#include <string>
int main()
{ using namespace std;
string str;
std::cout<<"Please input your name:\n";
getline(cin,str);
std::cout<<"Hello,"<<str<<"!!\n";
}
thank you !!