程序代码：

#include <stdio.h>
#include <conio.h>

int score;

void play(void);

int main(void)
{
    printf("w a s d\n");
    printf("press any key to start except 'q'.\n");
    do
    {
        score=0;
        getch();
        play();
    }
    while( getch()!='q' );
    getch();
}

void play(void)
{
    char a;
    char input;
    int ctrl;
    for(ctrl=0; ctrl<10; ctrl++)
    {
        a=rand()%4+24;
        printf("%c",a);
        input=getch();
        switch (a)
        {
        case 24:
            if(input=='w')
            {
                score++;
                printf(" ");
            }
            else
                printf("X ");
            break;
        case 25:
            if(input=='s')
            {
                score++;
                printf(" ");
            }
            else
                printf("X ");
            break;
        case 26:
            if(input=='d')
            {
                score++;
                printf(" ");
            }
            else
                printf("X ");
            break;
        case 27:
            if(input=='a')
            {
                score++;
                printf(" ");
            }
            else
                printf("X ");
            break;
        default:
            score--;
            printf("X ");
        }
    }
    printf("\nYou score is %d.\n",score);
printf("press any key to start except 'q'.\n");
}