What are LG and LGP in the following program ?

#include<stdio.h>

void main()

{

     typedef long LG,*LGP;

     extern LGP lptr;

}

Ans :  

Here, the first statement declares LG as a typedef for long and LGP as a pointer to a long. 

The second statement declares lptr of type LGP with storage class as extern.