Used to make fake CD keys for Steam for shits and giggles.

Codes.cpp

#include <iostream>
#include <random>
#include <ctime>
#include <vector>
#include <fstream>
#include <string>
using namespace std;

int main () {
	string content = "abcdefghijklmnopqrstuvwxyz0123456789";
	vector<string> codes;
	srand(time(0));
	fstream output("codes.txt", ios::out);

	cout << "Create how many?: ";
	int amount;
	cin >> amount;

	// open file
	if (output.is_open()) {
		for (int i = 0; i < amount; i++) {
			string code = "";
			for (int j = 0; j < 15; j++) {
				if (j == 5 || j == 10)
					code += "-";

				int randitem = rand() % content.length();
				code += toupper(content[randitem]);
			}

			// check for duplicates (sort of, whatever)
			if (i == 0) {
					codes.push_back(code);
					cout << i + 1 << ":\t" << code << endl;
					output << code << endl;
				} else {
					vector<string>::iterator it = find(codes.begin(), codes.end(), code);
					if (it == codes.end()) {
						codes.push_back(code);
						cout << i + 1 << ":\t" << code << endl;
						output << code << endl;
					} else {
						i--;
						cout << "Duplicate found, retrying..." << endl;
					}
				}
		}

		output.close();
		return 0;
	}
}