I am beginner in C++, I need to know which data structure to store addresses of objects in C++.
Thanks
You would need to use something called a "pointer."
Normal variables, such as
int a = 5 ;
double r = 39.9 ;
Contain values your program should read and use.
Pointers are variables that don't contain values your program should read and use - instead, pointers contain the address of some variable your program will read and use.
For example:
int *pA ;
pA = &a ; // pA is now a POINTER to a
*pA = 4 ; // variable a now contains 4, not 5!
So in the above, a few things are happening. First, the pointer variable pA is declared using a * in its declaration.
int *pA ;
Next, we give pA a value. What value? Why the address of a!
pA = &a ;
The function of pA is like a secondary handle to the variable a. When you modify what pA points to, you are actually modifying the variable a now .
*pA = 4 ;
The variable pA points to at the moment (which is a) gets changed to 4.
See these videos for a great visualization.
A pointer. (and here's some SO padding :)
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