[Valmont]

#include <string>
#include <iostream>

using namespace std;


int main(int argc, char* argv[])
{
	string nick;
	cout<<"Enter your nick: ";
	getline(cin, nick);
	cout<<nick<<endl;
	return 0;
}

Or:

int main(int argc, char* argv[])
{
	char nick[12];
	cout<<"Enter your nick: ";
	cin.getline(nick, 12, '\n' );
	cout<<nick<<endl;
	return 0;
}

Observe the cin.getline versus getline.
The cin version is the istream version. Use this when you work with C-style strings. Use getline without "cin" for the string type.