C++ LANGUAGE POINTERS

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C++ LANGUAGE POINTERS

Pointers in C++  


Pointers have many but easy concepts and they are very important to C++ 
programming. There are following few important pointer concepts which 
should be clear to a C++ programmer: 



Concept                 Description 
C++ Null Pointers         C++ supports null pointer, which is 
                               a constant with a value of zero defined 
                               in several standard libraries. 

C++ pointer arithmetic         There are four arithmetic operators 
                               that can be used on pointers: ++, --, +, - 

C++ pointers vs arrays         There is a close relationship between pointers and arrays.  

C++ array of pointers         You can define arrays to hold a number of pointers. 

C++ pointer to pointer         C++ allows you to have pointer on a pointer and so on. 

Passing pointers to functions  Passing an argument by reference or 
by address both enable the passed argument to be changed in 
the calling function by the called function. 

Return pointer from functions  C++ allows a function to 
return a pointer to local variable, static variable and 
dynamically allocated memory as well.