Question

1)

Explain the difference between:

Array of characters like char c[] = {'A', 'B', 'C'};

AND

c-string like string = "ABC";

2)

We can have two pointers that point to one memory location such as:

int *intPtr1, *intPtr2;

intPtr1 = &x;

intPtr2 = &x;

a) What method we have to make sure only one pointer points to a variable?

b) Give an example.

3)

a) Can a pointer to a constant receive an address of a constant item and/or non-constant item?

b) Explain and give example(s).

Answer 1

Here is the solution to above problem . Please read the explanation for more information

PLEASE GIVE A THUMBS UP!!!

1)

Explain the difference between:

Array of characters like char c[] = {'A', 'B', 'C'};

AND

c-string like string = "ABC";

Answer

A c character array does not contain the '\0' null character at the end hence it cannot be printed on the console like a c-string , where as the c-string "ABC" contains the '\0' null character at the end and can be printed on the console. '\0' character is used in C to tell the compiler when a c-string has ended

2)

We can have two pointers that point to one memory location such as:

int *intPtr1, *intPtr2;

intPtr1 = &x;

intPtr2 = &x;

Answer

Yes, we can have two pointers pointing to the same memory location, The task of a pointer is to store the memory address using the star operator (*) we can access the address stored inside a pointer. Hence it is perfectly alright situation where two pointers are pointing to same memory

3)

a) Can a pointer to a constant receive an address of a constant item and/or non-constant item?

b) Explain and give example(s).

Answer

Yes, A pointer to constant can store address of a non-constant variable as well, below is the code for same

   const int x=5;
   const int * p = &x;
   int y=7;
   p=&y;

This works without any issue