Windows 7: {Programming in C++} Command Prompt

#include <iostream>
#include <conio.h>
#include <string>
using namespace std;


void main(){

string selection;


cout << "Welcome to Command Prompt Extended - v1Beta r0001." << endl;
cout << "Created by Trinty. All rights reserved" << endl;
cout << endl;
cout << endl;
cout << "Enter number for function and press enter !" << endl;
cout << endl;
cout << "1. Enter Command Prompt" << endl;
cout << "2. Shutdown computer (60 sec)" << endl;
cout << "3. Run Disk Check " << endl;
cout << "4. Run ipconfig" << endl;
cout << "5. UNDER CONSTRUCTION !" << endl;
cout << "6. UNDER CONSTRUCTION !" << endl;
cout << "7. Unlock Windows CMD. USE AT YOUR OWN RISK !" << endl;
cout << "8. Add Administrator privileges" << endl;
cout << "9. About" << endl;
cout << "10. Exit" << endl;
cout << endl;
cin >> selection;
cout << endl;

if(selection == "1"){
string command;
cout << "Welcome to Command Prompt Classic edition." << endl;
cout << "Enter command and press enter to execute command" << endl;
cout << endl;
cin >> command;
cout << endl;
_getch();
}

}

Is this for Windows or Linux?

"system()" is a Linux function. On Windows you would use either ShellExecute or more likely CreateProcess with cmd.exe and pass your shell command as the command line for it...