Pointers: Part 1

Question 1

pointer

Answer 1

a variable whose value is a memory address

Question 2

Assign the address of var to a pointer ptr

Answer 2

ptr = &var;

Question 3

What does ptr = &val mean

Answer 3

ptr is a pointer variable of the same data type as val that stores the memory address of val

Question 4

What operator must be used to create a pointer variable?

Answer 4

The indirection/dereferencing (*) operator - it declares the datatype of the pointer variable

Question 5

What is the purpose of the indirection/dereferencing operator?

Answer 5

The * operator is used:
- to assign the value stored at the memory address pointed to by a pointer variable. E.g. - val = *ptr // finding the value ptr points to
- to declare a pointer variable. E.gs - int * pi, char * pc