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Array and Pointer

There are two widely used formats to represent a block of data: a pointer and an array:



char * cPtr;

char buf[80];

The name of an array is a constant pointer to the first element of the array. Therefore, the name of a charcter array is equal to const char *. You can not assign anther address to the array name like



buf = cPtr;

The other difference between a pointer and array is: a pointer such as char * cPtr can point to anywhere, most probably somewhere in the OS's territory that you can't access. An array such as char buf[80] however, points to a block of memory allocated by the compiler.

If a block of characters ends with NULL i.e. 0, it can be treated as a string, which is recognized in most applications.


Posted By :-Cplusplusprogramming

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