#define _WIN32_WINNT 0x0500
#define WIN32
#define NDEBUG
#define _CONSOLE
#include <iostream>
#include <tchar.h>
#include "windows.h"

char message[80];
char title[20];

void getMessage(int messageId) {
	if (messageId == 0) {
		strcpy(title, "Failure.");
		strcpy(message, "Invalid code.");
	} else {
		strcpy(title, "Success.");
		strcpy(message, "Thank you for activating.");
	}
}

void success() {
	getMessage(1);
	MessageBox(GetConsoleWindow(), message, title, MB_OK);
	// Persist activation info here
}

void failure() {
	getMessage(0);
	MessageBox(GetConsoleWindow(), message, title, MB_OK);
}

bool checkCode(char serial[], char userCode[]) {
	char actCode[5];
	actCode[0] = serial[2];
	actCode[1] = serial[0];
	actCode[2] = serial[3];
	actCode[3] = serial[1];
	actCode[4] = 0;

	return strcmp(userCode, actCode) == 0;
}


void main(void)
{
	// Get serial
	char serial[5];	
	printf("Enter your 4 character serial code: ");
	fgets(serial, sizeof(serial), stdin);

	// Create activation code

	
	// Read activation code
	char userCode[50];
	printf("Enter your 4 character activation code: ");
	scanf("%s", userCode);
	userCode[4] = 0;

	// Determine success
	if (checkCode(serial, userCode)) {
		success();
	} else {
		failure();
	}
}