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- #include <fastgraf.h>
- #include <stdio.h>
- #include <stdlib.h>
-
- void main(void);
-
- void main()
- {
- int old_mode;
- int hidden;
- int x;
-
- /* initialize the video environment */
-
- if (fg_testmode(13,3) == 0) {
- printf("This program requires EGA.\n");
- exit(1);
- }
- old_mode = fg_getmode();
- fg_setmode(13);
-
- /* draw the background on page two */
-
- fg_setpage(2);
- fg_setcolor(1);
- fg_rect(0,319,0,199);
- fg_setcolor(15);
- fg_move(160,100);
- fg_ellipse(20,20);
-
- /* slide the object across the screen */
-
- hidden = 1;
- fg_setcolor(10);
- for (x = -10; x < 320; x+=4) {
- fg_setpage(hidden);
- fg_transfer(0,319,0,199,0,199,2,hidden);
- fg_clprect(x,x+19,96,105);
- fg_setvpage(hidden);
- hidden = 1 - hidden;
- fg_waitfor(1);
- }
-
- /* restore the original video mode and return to DOS */
-
- fg_setmode(old_mode);
- fg_reset();
- }