Rock, Paper, Scissors

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <stdbool.h>

int rockPaperScissors();
char playerInput[20], computerOutput[20];
char *inputPossibilities[6]={"", "rock", "paper", "scissors", "q", "Q"};

int main()
{
    int playerInputInInt, computerOutputInInt;
    bool game=1;
    printf("Welcome to Rock, Paper, Scissors\n");
    while (game==1)
    {
        printf("Choose \"rock\", \"paper\" or \"scissors\" or \"q\" to exit\n");
        scanf("%s", playerInput);
        if (!strcmp(playerInput, "rock")&&!strcmp(playerInput, "paper")&&
            !strcmp(playerInput, "scissors")&&!strcmp(playerInput, "q")&&
            !strcmp(playerInput, "Q")==false)
        {
            printf("Please input again\n");
        }
        else if (!strcmp(playerInput, inputPossibilities[4])==true)//exit
        {
            game=0;
            break;
        }
        computerOutputInInt=rockPaperScissors();
        if (!strcmp(playerInput, "rock")==true)
            playerInputInInt=1;
        if (!strcmp(playerInput, "paper")==true)
            playerInputInInt=2;
        if (!strcmp(playerInput, "scissors")==true)
            playerInputInInt=3;
        if (playerInputInInt==computerOutputInInt)//tie
        {
            printf("The game was a tie because the computer chose %s\n", computerOutput);
        }
        else if (playerInputInInt==computerOutputInInt+1||computerOutputInInt-2)//win
        {
            printf("You won because the computer chose %s!\n", computerOutput);
        }
        else if (computerOutputInInt==playerInputInInt+1||playerInputInInt-2)//lose
        {
            printf("You lost because the computer chose %s!\n", computerOutput);
        }

    }
    return 0;
}

int rockPaperScissors()
{
    srand(time(NULL));
    int output=(rand()%3+1);
    strcpy(computerOutput, inputPossibilities[output]);
    return output;
}