C 程式設計作業四，迴圈與函數應用：解題

/* C Programming, Project 4 */
#include <stdio.h>
#include <stdlib.h>

int whoWin(int, int);
int main(void)
{
    int position = 0;
    int computerPlay, myPlay;
    int result;
    
    srand(time(NULL)); 
    while (position>4 && position<-4)
    {
        printf("%*c\n", (position+4)*5-1, 'f');
        printf("| -3 | -2 | -1 | 0  | 1  | 2  | 3  |\n\n");
        do 
        {
            printf("Enter your play: scissors(1), paper(2), or rock(3) ");
            scanf("%d", &myPlay);
        } while (myPlay!=1 && myPlay!=2 && myPlay!=3 );
        computerPlay = rand()%3 + 1; 
        if (computerPlay==1)
            printf("Computer play: scissors\n");
        else if (computerPlay==2)
            printf("Computer play: paper\n");
        else  if (computerPlay==3)
            printf("Computer play: rock\n");
            
        result = whoWin(computerPlay, myPlay);
        position += result;
    }

    system("pause");
    return 0;
}

int whoWin(int comp, int me)
{
    int winner;
    if (comp==me)
    {
        printf("--------------- MATCH ---------------\n");
        winner = 0;
    }
    else if (comp-me==1 || comp-me==-2)
    {
        printf("------------ PLAYER WIN -------------\n");
        winner=1;
    }
    else
    {
        printf("----------- COMPUTER WIN ------------\n");
        winner=-1;
    }
    return winner;
}

作業四題目
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