A fun little 8Ball project

I decided to make a 8Ball program just for fun here is the source:

#include <iostream>
#include <stdlib.h>
#include <ctime>

int main()
{
    srand(time(NULL));
    std::cout << "Welcome to your future!!! (8Ball)." << std::endl;
    std::cout << "What do you want to get the answer to? | Ask here: " << std::endl;

    std::string user_input;
    std::cin >> user_input;

    std::cout << "The 8Ball says!! ..." << std::endl;

    int result = (rand() % 20) + 1;

    switch (result) {
    case 1:
        std::cout << "It is certain." << std::endl;
        break;
    case 2:
        std::cout << "It is decidedly so." << std::endl;
        break;
    case 3:
        std::cout << "Without a doubt." << std::endl;
        break;
    case 4:
        std::cout << "Yes, definately." << std::endl;
        break;
    case 5:
        std::cout << "You can rely on it." << std::endl;
        break;
    case 6:
        std::cout << "As I see it, yes." << std::endl;
        break;
    case 7:
        std::cout << "Most likely." << std::endl;
        break;
    case 8:
        std::cout << "Outlook good." << std::endl;
        break;
    case 9:
        std::cout << "Yes." << std::endl;
        break;
    case 10:
        std::cout << "Signs point to yes." << std::endl;
        break;
    case 11:
        std::cout << "Reply hazy, try again." << std::endl;
        break;
    case 12:
        std::cout << "Ask again later." << std::endl;
        break;
    case 13:
        std::cout << "Better not tell you now." << std::endl;
        break;
    case 14:
        std::cout << "Cannot predict now." << std::endl;
        break;
    case 15:
        std::cout << "Concentrate and ask again." << std::endl;
        break;
    case 16:
        std::cout << "Don't count on it." << std::endl;
        break;
    case 17:
        std::cout << "My reply is no." << std::endl;
        break;
    case 18:
        std::cout << "My sources say no." << std::endl;
        break;
    case 19:
        std::cout << "Outlook not so good." << std::endl;
        break;
    case 20:
        std::cout << "Very doubtful." << std::endl;
        break;
    default:
        std::cout << "Somthing went wrong :(";
    }
}