更新内容：新的难度

#include <iostream>
#include <stdlib.h>
#include <time.h>
#include<windows.h>
using namespace std;

void Start();
void GetResults();

int i, j, maxrand;
int life;
char c;
void color(int a){
    SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), a);
} 
void Start() {
    i = 0;
    j = 0;
    life = 0;
    maxrand = 6;
    color(7);
    cout << "Select difficulty mode:\n"; // the user has to select a difficutly level
    cout << "1 : Easy (0-15)\n";
    cout << "2 : Medium (0-30)\n";
    cout << "3 : Difficult (0-50)\n";
    color(4);
    cout << "4 : THE MOST DUFFICULT (0-60000)\n";
    cout << "5 : MUCH MORE DIFFICULT (0-100000)\n";
    color(7);
    cout << "or type another key to quit\n";
    c = 30;

    cin >> c;                   // read the user's choice
    cout << "\n";

    switch (c) {
    case '1':
        maxrand = 15;  // the random number will be between 0 and maxrand
        break;
    case '2':
        maxrand = 30;
        break;
    case '3':
        maxrand = 50;
        break;
    case '4':
        maxrand = 60000;
        break;
    case '5':
        maxrand = 100000;
        break;
    default:
        exit(0);
        break;
    }

    life = 57666;         // number of lifes of the player
    srand((unsigned)time(NULL)); // init Rand() function
    j = rand() % maxrand;  // j get a random value between 0 and maxrand

    GetResults();
}

void GetResults() {
    if (life <= 0) { // if player has no more life then he loses
    //  cout << "You lose !\n\n";
    //  Start();
        life=2000000;
    }

    cout << "Type a number: \n";
    color(2);
    cout<<"The answer is:"<<j<<endl;
    color(7);
    cin >> i;

    if((i>maxrand) || (i<0)) { // if the user number isn't correct, restart
        cout << "Error: number not between 0 and \n" << maxrand;
        GetResults();
    }

    if(i == j) {
        color(6);
        cout << "YOU WIN!\n\n"; // the user found the secret number
        color(7);
        Start();
    } else if(i>j) {
        color(4);
        cout << "Too BIG\n";
        life = life - 1;
        color(14);
        cout << "Lives remaining: " << life << "\n\n";
        color(7);
        GetResults();
    } else if(i<j) {
        color(10);
        cout << "Too SMALL\n";
        life -= 1;
        color(14);
        cout << "Lives remaining: " << life << "\n\n";
        color(7);
        GetResults();
    }
}

int main() {
    //color(2);
    cout << "** Jackpot game **\n";
    cout << "The goal of this game is to guess a number.\n";
    cout << "Jackpot will tell you if the number is too big or too\n";
    cout << "small compared to the secret number to find.\n\n";
    //color(7);
    Start();
    return 0;
}