C圖形編程5

/*********************************/
/*      一個簡單的圖形 program   */
/*      author:xwlee             */
/*      time: 06/11/3            */
/*********************************/
#include "stdio.h"
#include "conio.h"
#include "bios.h"

char leftbuf[40*25*2];
char rightbuf[40*25*2];
int leftx,lefty;
int rightx,righty;
void draw_left_win();
void draw_right_win();

int main()
{
    int key;
    int turn;

    textmode(C80);
    textbackground(13);
    textcolor(WHITE);
    clrscr();
    gotoxy(25,1);
    cprintf("author:xwlee  press esc to quit");

    window(42,2,79,24);
    textbackground(2);
    textcolor(4);
    clrscr();
    gettext(42,2,79,24,rightbuf);

    window(2,2,39,24);
    textbackground(1);
    textcolor(15);
    clrscr();
    gettext(2,2,39,24,leftbuf);

    turn=0;

    for(;;)
    {
        key=bioskey(0);
        if(key==0x11b)
             exit(0);
        key=key&0xff;
        if(key=='/t')
        {
            if(turn==0)
            {
                gettext(2,2,39,24,leftbuf);
                leftx=wherex();
                lefty=wherey();
                draw_right_win();
                turn=1;
            }
            else if(turn==1)
            {
                gettext(42,2,79,24,rightbuf);
                rightx=wherex();
                righty=wherey();
                draw_left_win();
                turn=0;
            }
        }
        else
            putch(key);

    }

   getch();
   return 0;
}

void draw_right_win()
{
    window(42,2,79,24);
    textbackground(2);
    textcolor(4);
    clrscr();
    puttext(42,2,79,24,rightbuf);
    gotoxy(rightx,righty);
}

void draw_left_win()
{
    window(2,2,39,24);
    textbackground(1);
    textcolor(15);
    clrscr();
    puttext(2,2,39,24,leftbuf);
    gotoxy(leftx,lefty);
}