Question

• Write a C++ die roller program.
• We need you to write a program that will roll dice for them, but not just six-sided dice.
• Your program needs to be able to take an input in for form nDx or ndx where the d is the letter d or D.
• n may or not be present. If it is, it represents the number of dice. If not, assume it is a 1.
• x may or may not be present. If it is, it represents the number of sides on the die. If it is absent, assume it is a 6.
• If n is absent, x must be present. If x is absent, n must be present.
• Remember, you need to roll each die individually and then add up the values. Also show the individual dice if n > 1.
• For example: 2d means roll 2 six-sided dice (2d6). d20 means roll one 20-sided die (1d20)
• Assume for the time being that you will only receive valid input.

Answer 1

Please find the requested program below. Also including the screenshot of sample output and screenshot of code to understand the indentation.

Please provide your feedback
Thanks and Happy learning!

#include <iostream>
#include <string>
#include <sstream>
#include <time.h>

int main()
{
    std::string strInput;
    int diceCount = 1;
    int diceSideCount = 6;

    std::cout << "Enter the input in the format nDx or ndx : ";
    std::getline(std::cin, strInput);

    if (!strInput.empty())
    {
        size_t foundPos = 0;
        if ((foundPos = strInput.find_first_of('d')) == std::string::npos && (foundPos = strInput.find_first_of('D')) == std::string::npos)
        {
            std::cout << "ERROR: Invalid input format." << std::endl;
            return 1;
        }

        std::string strCount = strInput.substr(0, foundPos);
        std::string strSideCount = strInput.substr(foundPos + 1);

        //If n is absent, x must be present. If x is absent, n must be present.
        if (strCount.empty() && strSideCount.empty())
        {
            std::cout << "ERROR: Invalid input." << std::endl;
            return 1;
        }

        std::stringstream ss;
        ss.clear();
        if (!strCount.empty())
        {
            ss << strCount;
            ss >> diceCount;
        }

        ss.clear();
        ss.flush();
        if (!strSideCount.empty())
        {
            ss << strSideCount;
            ss >> diceSideCount;
        }

        srand(time(NULL));
        int totalDiceReading = 0;
        for (int i = 1; i <= diceCount; ++i)
        {
            //roll the dice;
            //Generate a random value between 1 and diceSideCount
            int diceReading = std::rand() % diceSideCount + 1;
            //show the individual dice if n > 1.
            if (diceCount > 1)
            {
                std::cout << "Dice " << i << " reading: " << diceReading << std::endl;
            }
            totalDiceReading += diceReading;
        }

        std::cout << "Total dice reading : " << totalDiceReading << std::endl;
    }
    else
    {
        std::cout << "ERROR: Invalid input." << std::endl;
    }

    return 0;
}