C program to show and hide mouse pointer

#include<iostream.h>

#include<conio.h>

#include<math.h>

#include<graphics.h>

#include<dos.h> 

union REGS i,o; 

void showpointer();

void hidepointer();

int init_mouse();

int main()

{ 

int gd=DETECT,gm,status; 

initgraph(&gd,&gm,"C:\\turboc3\\bgi"); 

status = init_mouse(); 

if(status==0) 

{ 

outtextxy(200,240,"NO MOUSE SUPPORT.");

 }

else 

{ 

while(1) 

{ 

char opt;

 cleardevice();

 cout<<"\n1.Press s to show pointer\n2.Press h to hide pointer\n3.Press any key to exit\n"; 

cout<<"\nEnter the option : ";

 //take user input 

opt=getch();

 if(opt == 's') 

showpointer(); 

else if (opt == 'h') 

hidepointer();

 //hides the pointer 

else 

 break; 

} 

} 

closegraph();

 return 0;

} 

void showpointer()

{ 

i.x.ax=1; 

int86(0X33,&i,&o);

} 

void hidepointer()

{ 

i.x.ax=2; 

int86(0X33,&i,&o);

} 

int init_mouse()

{ 

i.x.ax = 0; 

int86(0X33,&i,&o); 

return(o.x.ax);

}