Hi, I\'m trying to write a C program that focuses on using enum. Thing is, I\'m

Question

Hi, I'm trying to write a C program that focuses on using enum. Thing is, I'm not sure if I'm doing it right. The program runs correctly, I just don't know what to put after i type "enum choices{ r, p, s }; //rock=0, paper = 1, scissors = 2
   enum choices choice;" because the focus of the assignment is to do enum.

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
void start_play();

int main(int argc, char* argv[])
{
start_play();
       return 0;
}
void start_play()
{
   enum choices{ r, p, s }; //rock=0, paper = 1, scissors = 2
   enum choices choice;
   {
       char p1, p2, p3;

       printf("Player-1 it is your turn! ");
       printf("Please enter your choice (p)aper. (r)ock, or (s)cissors: ");
       p1 = getchar();
       scanf("%c", &p3);//to avoid the buffer

       printf("Player-2 it is your turn! ");
       printf("Please enter your choice (p)aper. (r)ock, or (s)cissors: ");
       scanf("%c", &p2);
       if (p1 == p2){
           printf("Draw, nobody wins ");
       }
       else{
           if (p1 == 'p'){
               if (p2 == 'r'){
                   printf("Player1 wins! paper covers rock! ");
               }
               else if (p2 == 's'){
                   printf("Player2 wins! Scissors cut paper! ");
               }
           }
           else if (p1 == 'r'){
               if (p2 == 's'){
                   printf("Player1 wins! Rock breaks scissors! ");
               }
               else if (p2 == 'p'){
                   printf("Player2 wins! Paper covers rock! ");
               }
           }
           else if (p1 == 's'){
               if (p2 == 'r'){
                   printf("Player2 wins! Rock breaks scissors! ");
               }
               else if (p2 == 'p'){
                   printf("Player1 wins! Scissors cut paper! ");
               }
           }
       }
   }
}

Explanation / Answer

#include <stdio.h>

using namespace std;

enum objectType {ROCK, PAPER, SCISSORS};

void displayRules();
objectType retrievePlay(char selection);
bool validSelection(char selection);
void convertEnum(objectType object);
objectType winningObject(objectType play1, objectType play2);
void gameresult(objectType play1, objectType play2, int& winner);
void displayResults(int gCount, int wCount1, int wCount2);

int main()
{
   int gameCount;
   int winCount1;
   int winCount2;

   int gamewinner;
   char response;

   char selection1;
   char selection2;
   objectType play1;
   objectType play2;

   gameCount = 0;
   winCount1 = 0;
   winCount2 = 0;

   displayRules(0;

   cout <> response;
   cout << endl;

   while(respone == 'y' || response == 'Y')
   {

       cout <> selection1;
       cout << endl;
       cout <> selection2;
       endl;

       if(validSelection(selection1) && validSelection(selection2))
       {

           play1 = retrievePlay(selection1);
           play2 = retrievePlay(selection2);
           gameCount++;
           gameResults(play1, play2, gameWinner);

           if(gameWinner == 1)
               winCount1++;
           else if(gameWinner == 2)
               winCount2++;
       }
       displayResults(gameCount, winCount1, winCount2);
       return 0;
   }

}

void displayRules()
{
   cout << "Welcome to the game of Rock, Paper and Scissors," << endl;
   cout << "This is a game for two players. For each game, each " << endl;
   cout << "player selects one of the objects Rock, Paper or Scissors" << endl;
   cout << "The rules for winning the game are: " << endl;
   cout << "1. If both players selects the same object it is a tie" << endl;
   cout << "2. Rock breaks Scissors" << endl;
   cout << "3. Paper covers Rock" << endl;
   cout << "4. Scissors cuts Paper" << endl;
   cout << "Enter R/r for Rock, P/p for Paper and S/s for Scissors" << endl;
}

bool validSelection(char selection)
{
   case 'R':
   case 'r':
   case 'P':
   case 'p':
   case 's':
   case 'S':
       return true;
   default:
       return false;
}

objectType retrievePlay(char selection)
{
   objectType object;
   switch(selection)
   {
       case 'r':
       case 'R':
           object = ROCK;
           break;
       case 'p':
       case 'P':
           object = PAPER;
           break;
       case 's':
       case 'S':  
           object = SCISSORS;
   }
   return object;
}

void gameResults(objectType play1, objectType play2, int& winner)
{
   if(play1 == play2)
   {
       winner = 0;
       cout << "Both Player selected";
       convertEnum(play1);
       cout << "This game is a tie" << endl;
   }
   else
   {
       winnerObject = winningObject(play1, play2);
       cout << "Player 1 selected ";
       convertEnum(play1);
       cout << " and player 2 selected ";
       convertEnum(play2);
       cout << ". ";

       if(play1 == winnerObject)
           winner = 1;
       else if(play2 == winnerObject)
           winner = 2;
       cout << "Player " << winner << " wins the game." << endl;
   }
}

void convertEnum(objectType object)
{
   switch(object)
   {
       case ROCK:
           cout << "Rock";
           break;
       case PAPER:
           cout << "Paper";
           break;
       case SCISSORS:
           cout << "Scissors";
   }
}

objectType winningObject(objectType play1, objectType play2)
{
   if((play1 == ROCK && play2 == SCISSORS) || (play2 == ROCK && play1 == SCISSORS)
       return ROCK;
   else if((play1 == ROCK && play2 == PAPER) || (play2 == ROCK && play1 == PAPER)
       return PAPER
   else
       return SCISSORS;
}

void displayResults(int gCount, int wCount1, int wCount2)
{
   cout << "The total number of play: " << gCount << endl;
   cout << "The number of plays won by player 1: " << wCount1 << endl;
   cout << "The number of plays won by player 2: " << wCount2 << endl;
}

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