Question

So, I have this code fragment:

int * iPtr ;
int * jPtr ;
int i = 5, k = 7;
iPtr = &i;
jPtr = iPtr ;

I have just started learning about pointers, and need to get some doubts cleared.

1. is jPtr now essentially also pointing at i?
2. I know I can change the value of i by using *iPtr, but how can I change the value of the object being pointed to by jPtr?
3. How will changing the object being pointed to by jPtr affect the value of the object pointed to by iPtr, and i ?

Answer 1

1000 1001 1002   1004         --> address location ( note: just indicative)
----------------------------
| 5 | 7 | 1000 | 1000 |
| i | j | iPtr | jPtr |
-----------------------------
 ^^        |       |
 ||________|       |
 |_________________|

iPtr=&i; --> iPtr points to i ==> address of i is stored in iPtr ==> *iPtr contents of i 
jPtr=iPtr; ->jPtr points to i