错误：没有用于调用“getline”的匹配函数

Question

#include<iostream>
#include<string>
using namespace std;
int main(){
    //initializing two string

     string s2,s1="hello";

     cout<<s2<<s1;

     cout<<endl;
     //transferring(copying) data from s1 to s2 
       getline(s1,s2);

     cout<<s2<<s1;
}

Answer 1

The error is caused by the fact that there is no getline that would accept two strings as parameters.

To "transfer" or copy data from s1 to s2 you write

s2 = s1;

It is unclear why you think you need getline . The method getline is for different purpose about which you can read eg here .

Answer 2

You are using getline wrong, please take a look at: http://www.cplusplus.com/reference/string/string/getline/

The getline function takes 2 parameters (a Istream and a string, instead of two times a string), that is the reason why you get the error.

If you just want to copy a string, you can use the following code:

std::string s1 = "myString";
std::string s2 = s1;