C Program to display mouse pointer

#include<stdio.h>
#include<dos.h>

int initmouse();
void showmouseptr();

union REGS i, o;

int main() {
   int status;
   status = initmouse();

   if (status == 0) {
      printf("Mouse support not available.n");
   } else {
      showmouseptr();
   }

   return 0;
}

int initmouse() {
   i.x.ax = 0;
   int86(0X33, &i, &o);
   return (o.x.ax);
}

void showmouseptr() {
   i.x.ax = 1;
   int86(0X33, &i, &o);
}