C++ ile Matrix

#include <iostream>
using namespace std;

main() {
       int x;
       system("TITLE The Matrix");
system("color 0A");
       x=0;
      
       while(x<5){
                  cout << "Q W E T R Y T - * 9 8 7 6 ? / 6 3 A S D C B N V N M C ";
                  x+x-1;
                  
                  }
       cin >> x;
       }