Declarations:
int getmaxx();
int getmaxy();
Function getmaxx returns the maximum X coordinate for current graphics mode and driver.
Function getmaxy returns the maximum Y coordinate for current graphics mode and driver.
C program
#include<graphics.h>
#include<conio.h>
#include<stdio.h>
#include<conio.h>
#include<stdio.h>
int main()
{
int gd = DETECT, gm, X, Y;
char a[100];
initgraph(&gd,&gm,"C:\\TC\\BGI");
X = getmaxx();
Y = getmaxy();
sprintf(a, "Maximum X and Y coordinates for current graphics mode and driver are %d and %d respectively.", X, Y);
outtext(a);
getch();
closegraph();
return 0;
}