遇到了一些問題，有些地方不能運行

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

#define High 15         //遊戲畫面尺寸
#define Width 20

//全局變量
int ball_x,ball_y;      //小球的坐標
int ball_vx,ball_vy;    //小球的速度
int canvas[High][Width] = {0};  //二維數組存儲遊戲畫布中的對應元素，0為空格，1為小球
int position_x,position_y;
 
int ridus;
int left,right;

void gotoxy(int x, int y)       //將光標移到(x,y)位置
{
    HANDLE handle = GetStdHandle(STD_OUTPUT_HANDLE);
    COORD pos;
    pos.X = x;
    pos.Y = y;
    SetConsoleCursorPosition(handle,pos);
}

void startup()          //數據的初始化
{
    ball_x = position_x;
    ball_y = position_y;
    ball_vx 
 
= -1;
    ball_vy = 1;
    canvas[ball_x][ball_y] = 1;

    ridus = 5;
    position_x = High-1;
    position_y = Width/2;
    left = position_y-ridus;
    right = position_y+ridus;

    int k,i;

    for(k = left; k <= right; k++)
        canvas[position_x][k] = 2;

    for(k = 0; k < Width; k++)
        
 
for(i = 0; i < High/4; i++)
            canvas[i][k] = 3;
}

void show()         //顯示畫面
{
    gotoxy(0,0);
    int i,j;

    for(i = 0; i < High; i++)
    {
        for(j = 0; j < Width; j++)
        {
            if(canvas[i][j] == 0)
                printf(" ");
            else if(canvas[i][j] == 1)
                printf("0");
            else if(canvas[i][j] == 2)
                printf("*");
            else if(canvas[i][j] == 3)
                printf("#");
        }
        printf("|\n");
    }

    for(j = 0; j < Width; j++)
        printf("-");
    printf("\n");
}

void updateWithoutInput()       //與用戶輸入無關的更新
{
    if(ball_x == High-2)
    {
        if((ball_y >= left) && (ball_y <= right))
        {

        }
        else{
            printf("遊戲失敗\n");
            system("pause");
            exit(0);
        }
    }

    static int speed = 0;

    if(speed < 7)
        speed++;
    if(speed == 7)
    {
        speed = 0;

    canvas[ball_x][ball_y] = 0;

    ball_x = ball_x+ball_vx;
    ball_y = ball_y+ball_vy;

    if((ball_x == 0) || (ball_x == High-1))
        ball_vx = -ball_vx;

    if((ball_y == 0) || (ball_y == Width-1))
        ball_vy = -ball_vy;

    canvas[ball_x][ball_y] = 1;

    if(canvas[ball_x-1][ball_y] == 3)
    {
        ball_vx = -ball_vx;
        canvas[ball_x-1][ball_y] = 0;
        printf("\a");
    }

    }
}

void updateWithInput()      //與用戶輸入有關的更新
{
    char input;

    if(kbhit())
    {
        input = getch();

        if(input == ‘a‘ && left > 0)
        {
            canvas[position_x][right] = 0;
            position_y--;
            left = position_y-ridus;
            right = position_y+ridus;
            canvas[position_x][left] = 2;
        }

        if(input == ‘d‘ && right < Width-1)
        {
            canvas[position_x][left] = 0;
            position_y++;
            left = position_y-ridus;
            right = position_y+ridus;
            canvas[position_x][right] = 2;
        }
    }
}

int main()
{
    startup();
    while(1)
    {
        show();
        updateWithoutInput();
        updateWithInput();
    }

    return 0;
}

C語言——反彈球遊戲（第三階段