cpp tips

various usage of const keyword with variable:


1.char* const ptr1 ="Good";

2.int const *ptr2 = &m ; //content is constant

3.const char* const cp = "xyz" ; //Both address and content is constant



can u differentiate the above three usage ?

...

Ans :

1.char* const ptr1 ="Good"; //address is constant

2.int const *ptr2 = &m ; //content is constant

3.const char* const cp = "xyz" ; //Both address and content is constant


Is there any difference between new() and malloc() ?

new operator advantages than malloc :

1.new operator will automatically computes the size of the object.

No need to use sizeof() operator.

2.It automatically returns the correct pointer type. So there is no need to use a type cast.

3.It is possible to initialize the object while creating the memory space.

4. like any other operator, new operator can be overloaded.