cin.getline : 没有匹配的调用函数

Question

In many answers and questions such as this one, it is recommended to use cin.getline from <string> and not getline(cin, variable) :

#include <iostream>
#include <string>

using namespace std;

int main() {
    string name;
    cin.getline(name);
}

But in my case I have build issue:

g++ foo.cpp
foo.cpp: In function ‘int main()’:
foo.cpp:8:21: error: no matching function for call to 
   ‘std::basic_istream<char>::getline(std::string&)’
    8 |     cin.getline(name);
      |                     ^

Answer 1

From the error told by the compiler, it is evident that there is no such function overload that accepts a type reference to std::string (for cin.getline() ). Rather, it accepts parameters like:

const int MAX = 100;

char input[MAX];
cin.getline(input, MAX);
// Or better
// cin.getline(input, sizeof input);