what is the equivalent of console.readline(); in C++?

Answer 1

string str;
getline(cin, str);

Answer 2

so
#include <iostream>
using namespace std;
int main()
{
cout << "Hello World";
return 0;
}
string str;
getline(cin, str);

Answer 3

ok

Answer 4

or even cin.getline(str, size_of_stream)
http://www.cplusplus.com/reference/istream/istream/getline/