C++ LANGUAGE POINTER ARITHMETIC

COMPUTER LANGUAGES HTML,C,C++.JAVA,.NET AND MULTIMEDIA basics and programs click home button

C++ LANGUAGE POINTER ARITHMETIC

Pointer Arithmetic 


As you understood pointer is an address which is a numeric 
value; therefore, you can perform arithmetic operations on 
a pointer just as you can a numeric value. There are four 
arithmetic operators that can be used on pointers: ++, --, +, and - 

To understand pointer arithmetic, let us consider that ptr is 
an integer pointer which points to the address 1000. Assuming 
32-bit integers, let us perform the following arithmatic 
operation on the pointer: 

ptr++ 

the ptr will point to the location 1004 because each time 
ptr is incremented, it will point to the next integer. 
This operation will move the pointer to next memory 
location without impacting actual value at the memory location. 
If ptr points to a character whose address is 1000, then above 
operation will point to the location 1001 because next 
character will be available at 1001.