函数名: getmoderange

功 能: 取给定图形驱动程序的模式范围

用 法: void far getmoderange(int graphdriver, int far *lomode,

int far *himode);

程序例:

#include <graphics.h>

#include <stdlib.h>

#include <stdio.h>

#include <conio.h>

int main(void)

{

/* request auto detection */

int gdriver = DETECT, gmode, errorcode;

int midx, midy;

int low, high;

char mrange[80];

/* initialize graphics and local variables */

initgraph(&gdriver, &gmode, "");

/* read result of initialization */

errorcode = graphresult();

if (errorcode != grOk) /* an error occurred */

{

printf("Graphics error: %s\", grapherrormsg(errorcode));

printf("Press any key to halt:");

getch();

exit(1); /* terminate with an error code */

}

midx = getmaxx() / 2;

midy = getmaxy() / 2;

/* get the mode range for this driver */

getmoderange(gdriver, &low, &high);

/* convert mode range info. into strings */

sprintf(mrange, "This driver supports modes %d..%d", low, high);

/* display the information */

settextjustify(CENTER_TEXT, CENTER_TEXT);

outtextxy(midx, midy, mrange);

/* clean up */

getch();

closegraph();

return 0;

}