system("title variable"); ?

[Haximus]

How would I set the title of the window to a variable (string) ?

[long double main]

Since you seem to be using Windows...

#include <string>
#include <windows.h>

void setTitle(const std::string& title)
{
    SetConsoleTitle(title.c_str());
}

(try to avoid using system() whenever you can)