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In C++ whats the difference between
char const *ptr=&ch;
and
const char *ptr=&ch;
518
Pointers must be declared before they can be used, just like a normal variable. The syntax of declaring a pointer is to place a * in front of the name. A pointer is associated with a type (such as int and double ) too.
A pointer is a variable that stores the address of another variable. Unlike other variables that hold values of a certain type, pointer holds the address of a variable. For example, an integer variable holds (or you can say stores) an integer value, however an integer pointer holds the address of a integer variable.
You need to initialize a pointer by assigning it a valid address. This is normally done via the address-of operator (&). The address-of operator (&) operates on a variable, and returns the address of the variable. For example, if number is an int variable, &number returns the address of the variable number.
They are the same, i.e. pointer to const char.
However char * const ptr is different, being a const pointer to (non-const) char.
And just to complete the set, const char * const ptr is a const pointer to const char.
180
No difference in C++.
It is important const is before * or after *.
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