getline compile error: no matching function for call to 'getline'

[killingthemonkey]

I'm working my way through "Jumping Into C++." I was working on Ivor Horton's book, but felt I wasn't retaining anything. I was several chapter's in and didn't feel like I could repeat anything I had supposedly learned.

So I'm working on one of the samples in the book and it has a getline function. I've typed the code exactly as in the book and get the following error:

Info: Internal Builder is used for build
g++ -O0 -g3 -Wall -c -fmessage-length=0 -o username_password.o "..\\username_password.cpp" 
..\username_password.cpp: In function 'int main()':
..\username_password.cpp:18:29: error: no matching function for call to 'getline(std::istream&, std::string&, const char [2])'
  getline(cin, username, "\n");
                             ^
..\username_password.cpp:18:29: note: candidates are:
In file included from c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\string:53:0,
                 from c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\bits\locale_classes.h:40,
                 from c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\bits\ios_base.h:41,
                 from c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\ios:42,
                 from c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\ostream:38,
                 from c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\iostream:39,
                 from ..\username_password.cpp:7:
c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\bits\basic_string.tcc:1068:5: note: template<class _CharT, class _Traits, class _Alloc> std::basic_istream<_CharT, _Traits>& std::getline(std::basic_istream<_CharT, _Traits>&, std::basic_string<_CharT, _Traits, _Alloc>&, _CharT)
     getline(basic_istream<_CharT, _Traits>& __in,
     ^
c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\bits\basic_string.tcc:1068:5: note:   template argument deduction/substitution failed:
..\username_password.cpp:18:29: note:   deduced conflicting types for parameter '_CharT' ('char' and 'const char*')
  getline(cin, username, "\n");
                             ^
In file included from c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\string:52:0,
                 from c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\bits\locale_classes.h:40,
                 from c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\bits\ios_base.h:41,
                 from c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\ios:42,
                 from c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\ostream:38,
                 from c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\iostream:39,
                 from ..\username_password.cpp:7:
c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\bits\basic_string.h:2793:5: note: template<class _CharT, class _Traits, class _Alloc> std::basic_istream<_CharT, _Traits>& std::getline(std::basic_istream<_CharT, _Traits>&, std::basic_string<_CharT, _Traits, _Alloc>&)
     getline(basic_istream<_CharT, _Traits>& __is,
     ^
c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\bits\basic_string.h:2793:5: note:   template argument deduction/substitution failed:
..\username_password.cpp:18:29: note:   candidate expects 2 arguments, 3 provided
  getline(cin, username, "\n");                        ^

Here is my code:

#include <iostream>
#include <string>

using namespace std;

int main()
{
	string username;
	string password;

	cout << "Enter your username: " << "\n";
	getline(cin, username, "\n");

	cout << "Enter your password\n ";

	if(username == "rppt" && password == "xyzzy")
	{
		cout << "Access granted.\n";
	}
	else
	{
		cout << "Access denied.";
		return 0;
	}

	return 0;
}

I did search the error, and looked at several other posts, both here and stackexchange, but none of the other's issues fit mine exactly.

[Yanson]

The third parameter to getline is a character not a string.

[killingthemonkey]

@Yanson, thank you. Changed to single quotes and compiles flawlessly.