Program to Emulate N Dice Roller

Last Updated : 29 Jul, 2021

In this article, we emulate N Dice roller. Given N, the task is to create a Java program which outputs N random numbers where each number is in the range 1 to 6 inclusive. Such type of emulation can be used in games and apart from that some similar variations of the problem statement can be used in several other applications.

Example1:

Enter the Number of dice: 4  
Hey Geek! You rolled: 3 2 1 6
Total: 12

Example2:

Enter the Number of dice: 2  
Hey Geek! You rolled: 1 6
Total: 7

Note: The output may change since we are using random numbers.

Approach:

Here, we use the Random object in Java to generate random integers in the range 1 to 6 inclusive and execute a loop to generate such random numbers N times.

Implementation

C++

#include <cstdlib>
#include <ctime>
#include <iostream>
using namespace std;
int main()
{
    int numberOfDice, total = 0;
 
    cout << "Enter the Number of dice: ";
    cin >> numberOfDice;
   
    // calling srand() with time() function for seed
    // generation
    srand((unsigned)time(0));
    cout << "Hey Geek! You rolled: ";
 
    for (int i = 0; i < numberOfDice ; i++)
    {
       
        // Generating the random number and storing it
        // in the 'randomNumber' variable
        int  randomNumber = (rand() % 6) + 1;
        total +=  randomNumber;
        cout <<  randomNumber << " ";
    }
    cout << "\n"
         << "Total: " << total << "\n";
    return 0;
}
 
// This code is contributed by anurag31.

Java

import java.util.Random;
import java.util.Scanner;
 
public class Main {
    public static void main(String args[])
    {
        System.out.print("Enter the number of dice: ");
 
        // Initializing the Scanner object to read input
        Scanner input = new Scanner(System.in);
        int numberOfDice = input.nextInt();
 
        // Initializing the Random object for
        // generating random numbers
        Random ranNum = new Random();
 
        System.out.print("Hey Geek! You rolled: ");
        int total = 0;
        int randomNumber = 0;
 
        for (int i = 0; i < numberOfDice; i++) {
 
            // Generating the random number and storing it
            // in the 'randomNumber' variable
            randomNumber = ranNum.nextInt(6) + 1;
            total = total + randomNumber;
            System.out.print(randomNumber);
            System.out.print(" ");
        }
 
        System.out.println("");
        System.out.println("Total: " + total);
        input.close();
    }
}

Output

Random Dice output

Time Complexity: O(N)

Auxiliary Space: O(1)

Java Program to Implement Park-Miller Random Number Generation Algorithm

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Program to Emulate N Dice Roller

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