Concept explainers
Pointer:
Pointer will allow the user to indirectly access and manipulate the variable data contents. A pointer variable will hold the address of the data contents. If an asterisk “*” operator is present before the variable then that variable is referred as pointer variable.
Consider the following statement:
//definition of pointer variable
int *ptrvar;
Here the variable “ptrvar” is defined to a pointer variable of integer data type. So, it can store the address of an integer variable.
Pointer to constant:
When an address of a constant item is passed to a pointer such that no modification can be made to that variables pointer to constants can be used.
Example:
//definition of pointer to constant variable
const int *ptr;
Explanation:
In the above definition, the variable “ptr” is declared as constant and any change made will not be accepted by the compiler.
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