#include<windows.h>
#include<stdio.h>
#include<stdlib.h>
#include<graphics.h>
#include<conio.h>
#define up_x 5
#define up_y 5//上界


int main(void)
{
    COORD *biankuang(void);//添加边框的函数
    HANDLE hout;//定义句柄
    COORD gotoxy,*p;//初始坐标
    int i,j,end,down_x,down_y;//下界   
    char c,d;
    hout=GetStdHandle(STD_OUTPUT_HANDLE);//句柄,标准输出
   
    SetConsoleTextAttribute(hout,FOREGROUND_RED);//控制台字体颜色
    p=biankuang();//调用边框

    circle(2,2,1);//????

    gotoxy.X=p->X-20;gotoxy.Y=p->Y-10;
    i=p->X-20;j=p->Y-10;
    down_x=p->X;down_y=p->Y;
    SetConsoleCursorPosition(hout, gotoxy);//输出初始图案
    printf("%c",2);
    for(end=0;;end++)
    {
        c=getch();
        switch(c)
        {
        case 'w':j=j-1;break;
        case 'a':i=i-1;break;
        case 's':j=j+1;break;
        case 'd':i=i+1;break;//移动
        default: end=0;
        }

        if( (i<down_x&&i>up_x) && (j<down_y&&j>up_y) )
        {
            system("cls");
            biankuang();
            gotoxy.X=i;gotoxy.Y=j;
            SetConsoleCursorPosition(hout, gotoxy);
            printf("%c",2);
        }

        else
        {
            if(i==down_x&&j==down_y)
            {i--;j--;}
            else
            {if(i==down_x) i--;if(j==down_y) j--;}

            if(i==up_x&&j==up_y)
            {i++;j++;}
            else
            {if(i==up_x) i++;if(j==up_y) j++;}//让笑脸只能在框内运动
        }
    }


    return 0;
}




COORD *biankuang(void)//边框函数
{
        HANDLE Hout;
        COORD *p;
        COORD up={5,5};//上界点  
        COORD down={40,20};//下界点
        int i=up.X,j=up.Y;
        p = &down;
        Hout=GetStdHandle(STD_OUTPUT_HANDLE);
        SetConsoleTextAttribute(Hout,FOREGROUND_BLUE);//zitiyanse
        for(;up.Y<=down.Y;up.Y++)
        {
            for(up.X=i;up.X<=down.X;up.X++)
            {
                if(up.Y==j||up.Y==down.Y)
                {SetConsoleCursorPosition(Hout,up);printf("-");}
                else
                {
                  if(up.X==i||up.X==down.X)
                  {SetConsoleCursorPosition(Hout,up);printf("|");}
                  else putchar(' ');
                }
            }
            putchar('\n');
        }
        return(p);
}

文本模式和圖形模式不能混在一起

版主大神，明白了！