Question

How would you code players taking turns, while having a score system. Please add examples in C++.

Answer 1

#include <iostream>
#include <cstdlib>

using std::cout;
using std::cin;
using std::endl;

int dieRoll();
int humanTurn(int);
int computerTurn(int);

int main()
{
        int humanTotalScore = 0, computerTotalScore = 0;
                
        //loop to keep playing until someone scores 100+
        do
        {
                humanTotalScore = humanTotalScore + humanTurn(humanTotalScore); //add the score from a new turn to the running total
                cout << "Your total score so far is " << humanTotalScore << "." << endl;
                if(humanTotalScore >= 100)
                {
                        cout << "You win!";
                        break;
                }
                computerTotalScore = computerTotalScore + computerTurn(computerTotalScore); //add the score from a new turn to the running total
                cout << "CPU total score so far is " << computerTotalScore << "." << endl;
                if(computerTotalScore >= 100)
                {
                        cout << "Computer wins!";
                        break;
                }
        }
        while(humanTotalScore < 100 && computerTotalScore < 100);
                
        return 0;
}

//simulate rolling of die
int dieRoll()
{
                return (rand() % 6) + 1; //call to rand() returns 0-5, + 1 to give range 1-6, best way to avoid impossible die roll of 0
}

int humanTurn(int humanTotalScore)
{
        int thisTurnScore = 0, score = 0;
        char rollOrHold;
        
        //loop to keep going as long the player chooses Roll Again or a 1 is thrown
        do
        {
                        score = dieRoll(); //roll the die
                
                if(score == 1)
                {
                        cout << "You rolled a 1.  End of turn." << endl;
                        break;
                }
                
                thisTurnScore = thisTurnScore + score; //running total for this turn only
                                
                cout << "You rolled a " << score << ".  Score so far this turn is " << thisTurnScore << "." << endl;
                cout << "Roll again (r) or Hold (h)? ";
                cin >> rollOrHold;
        }
        while(rollOrHold == 'r' || rollOrHold == 'R');
        
        if(rollOrHold == 'h' || rollOrHold == 'H') return thisTurnScore; //finsh turn and return total score if player chooses to Hold
                
        return 0; //will only get this far if player rolled a 1
}

int computerTurn(int computerTotalScore)
{
        int thisTurnScore = 0, score = 0;
        
        //loop to keep going as long the CPU score for this turn is less than 20
        do
        {
                score = dieRoll(); //roll the dice
                
                if(score == 1)
                {
                        cout << "CPU rolled a 1.  End of turn." << endl;
                        break;
                }
                
                thisTurnScore = thisTurnScore + score; //running total for this turn only
                                
                cout << "CPU rolled a " << score << ".  Score so far this turn is " << thisTurnScore << "." << endl;
        }
        while(thisTurnScore < 20);

        //finsh turn and return total score if the CPU scored 20+
        if(thisTurnScore >= 20)
        {
                cout << "CPU holds." << endl;
                return thisTurnScore;
        }
                
        return 0; //will only get this far if CPU rolled a 1
}