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Rock-­paper-­scissors C++

Mineanthat (2)
How I can change input from R,P,S to Rock, Paper, Scissors

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#include <iostream>

using namespace std;

int main()
{
    int game;
    char player1, player2;
    cin >> game;
    for(int i = 0;i<game;i++){
        cin >> player1 >> player2;
        switch(player1){
            case 'R':
                if (player2 == 'R')
                    cout << "draw" << endl;
                if (player2 == 'P')
                    cout << "player 2 win" << endl;
                if (player2 == 'S')
                    cout << "player 1 win" << endl;
                break;
            case 'P':
                if (player2 == 'R')
                    cout << "player 1 win" << endl;
                if (player2 == 'P')
                    cout << "draw" << endl;
                if (player2 == 'S')
                    cout << "player 2 win" << endl;
                break;
            case 'S':
                if (player2 == 'R')
                    cout << "player 2 win" << endl;
                if (player2 == 'P')
                    cout << "player 1 win" << endl;
                if (player2 == 'S')
                    cout << "draw" << endl;
                break;
            default:
                cout << "Invalid Entry";
                return 0;
        }
    }

    return 0;
}
AbstractionAnon (6954)
SImply change player1 and player2 from char to string.

Keep in mind that once you do that, you will no longer be able to use a switch statement.

Mineanthat (2)
Thank you :D
dhayden (5798)
Simply change player1 and player2 from char to string.

Unless they've changed something in C++11, that won't work because the switch() statement requires an integral type. So you would have to change the switch statement to an if/then/else.

Another way to do this is with more data. Create an enum with values Rock, Paper and Scissors. Then create a 2D array so that arr[player1][player2] gives the outcome of a round. Here, player1 and player2 are enum values. The value of the array might be 1, 2, or 0 to indicate player 1 wins, player 2 wins, or nobody wins.
whitenite1 (1785)
@Mineanthat

If you would still like to use the switch statement, you could write the program this way..

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#include <iostream>
#include <string>

using namespace std;

int main()
{
 int game;
 char player1, player2;
 string p[2];
 cout << "How many games of Rock, Paper Scissors, do you wish to play?" << endl;

 cin >> game;
 for(int i = 0;i<game;i++){
	cout << "Enter your choice, Rock, Paper or Scissor" << endl;
	cin >> p[0] >> p[1];
	player1=toupper(p[0][0]); // Gets first letter of Player 1 choice, and capitalizes it
	player2=toupper(p[1][0]); // same for player 2

	switch(player1){
	case 'R':
	 if (player2 == 'R')
		cout << "draw" << endl;
	 if (player2 == 'P')
		cout << "player 2 win" << endl;
	 if (player2 == 'S')
		cout << "player 1 win" << endl;
	 break;
	case 'P':
	 if (player2 == 'R')
		cout << "player 1 win" << endl;
	 if (player2 == 'P')
		cout << "draw" << endl;
	 if (player2 == 'S')
		cout << "player 2 win" << endl;
	 break;
	case 'S':
	 if (player2 == 'R')
		cout << "player 2 win" << endl;
	 if (player2 == 'P')
		cout << "player 1 win" << endl;
	 if (player2 == 'S')
		cout << "draw" << endl;
	 break;
	default:
	 cout << "Invalid Entry";
	 return 0;
	}
 }
 return 0;
}
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