Understand the pointer in C Understand how to create a C program, compile and execute it.

1. declare three integer variables a, b, c
2. declare three integer pointer variables pa, pb, pc
3. assign 12 to variable a, 9 to variable b
4. assign the address of variable a to variable pa
5. assign pa to pb
6. assign pa to pc
7. print out the values pointed by pa, pb, pc (dereferencing it)
8. assign the address of variable b to pa
9. print out the values pointed by pa, pb, pc (dereferencing it)
10. print out the values of pa, pb, pc