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850天前#include <graphics.h> |
#include <stdlib.h> |
#include <stdio.h> |
#include <conio.h> |
#define CLIP_ON 1 /* activates clipping in viewport */ |
int main ( void ) |
{ |
/* request auto detection */ |
int gdriver = DETECT, gmode, errorcode; |
int ht; |
/* initialize graphics and local variables */ |
initgraph ( &gdriver, &gmode, "" ); |
/* read result of initialization */ |
errorcode = graphresult(); |
if ( errorcode != grOk ) /* an error occurred */ |
{ |
printf ( "Graphics error: %s\n", grapherrormsg ( errorcode ) ); |
printf ( "Press any key to halt:" ); |
getch(); |
exit ( 1 ); /* terminate with an error code */ |
} |
setcolor ( getmaxcolor() ); |
ht = textheight ( "W" ); |
/* message in default full-screen viewport */ |
outtextxy ( 0, 0, "* <-- (0, 0) in default viewport" ); |
/* create a smaller viewport */ |
setviewport ( 50, 50, getmaxx()-50, getmaxy()-50, CLIP_ON ); |
/* display some messages */ |
outtextxy ( 0, 0, "* <-- (0, 0) in smaller viewport" ); |
outtextxy ( 0, 2*ht, "Press any key to clear viewport:" ); |
/* wait for a key */ |
getch(); |
/* clear the viewport */ |
clearviewport(); |
/* output another message */ |
outtextxy ( 0, 0, "Press any key to quit:" ); |
/* clean up */ |
getch(); |
closegraph(); |
return 0; |
} |
