display the information about mouse driver presence;

[aska2013]

display the information about mouse driver presence;

#include <dos.h>
#include <stdio.h>
#include <conio.h>
main()
{
  union REGS i,o;
  clrscr();
  i.x.ax=0;
  int86(0x33,&i,&o);

 if(o.x.ax==0)
  printf("No Mouse Available.....");
else
   printf("Mouse Available......");  
}

after compilation

mouse drive.cpp(13) : error C2065: 'i' : undeclared identifier
C:\Users\***\Desktop\mouse driver\mouse drive.cpp(13) : error C2228: left of '.x' must have class/struct/union type
C:\Users\***\Desktop\mouse driver\mouse drive.cpp(13) : error C2228: left of '.ax' must have class/struct/union type
C:\Users\**\Desktop\mouse driver\mouse drive.cpp(14) : error C2065: 'int86' : undeclared identifier
C:\Users\**\Desktop\mouse driver\mouse drive.cpp(14) : error C2065: 'o' : undeclared identifier
C:\Users\\**Desktop\mouse driver\mouse drive.cpp(16) : error C2228: left of '.x' must have class/struct/union type
C:\Users\***\Desktop\mouse driver\mouse drive.cpp(16) : error C2228: left of '.ax' must have class/struct/union type
C:\Users\***Desktop\mouse driver\mouse drive.cpp(20) : warning C4508: 'main' : function should return a value; 'void' return type assumed
Error executing cl.exe.

mouse drive.obj - 7 error(s), 1 warning(s)

how we can resolve it?

[MaTBeu]

Look here.