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Leer Pointers Brief Overview | Pointers and Structs
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Pointers Brief Overview

To go through the following chapters, I suggest briefly repeating the pointers in the C programming language.

Note

If you are not familiar with the basic skills of working with the C programming language, we recommend taking our basic C programming language course: C Basic

Dereferencing Operator

A pointer is a variable that contains the address of another object.

Dereference operator "*" returns the value stored at the address.

Declaring and initializing a pointer looks like this:

main.c

main.c

copy
12345678
#include <stdio.h> int main() { int* pName = NULL; printf("%p\n", pName); // `%p` is a specifier for a pointer return 0; }

Referencing Operator &

The "&" operator returns the address of an object:

main.c

main.c

copy
12345678
#include <stdio.h> int main() { int variable; printf("%p\n", &variable); return 0; }

A variable of pointer type is used to store the address, which is returned by the & operator.

To "unpack" the contents at the specified address, you must use the * operator on a variable of type pointer.

main.c

main.c

copy
12345678910
#include <stdio.h> int main() { int variable = 1024; int* pVariable = &variable; printf("Address: %p\n", pVariable); // `%p` specifier for a pointer printf("Returned value by address: %d\n", *(pVariable)); // using `*` to pointer return 0; }
Taak

Swipe to start coding

  1. Declare and initialize any variable with any value;
  2. Declare a pointer to the same data type as your variable;
  3. Assign the address of a variable to a pointer;
  4. Display an address of your variable;
  5. Display the value of the variable by the pointer.

Oplossing

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book
Pointers Brief Overview

To go through the following chapters, I suggest briefly repeating the pointers in the C programming language.

Note

If you are not familiar with the basic skills of working with the C programming language, we recommend taking our basic C programming language course: C Basic

Dereferencing Operator

A pointer is a variable that contains the address of another object.

Dereference operator "*" returns the value stored at the address.

Declaring and initializing a pointer looks like this:

main.c

main.c

copy
12345678
#include <stdio.h> int main() { int* pName = NULL; printf("%p\n", pName); // `%p` is a specifier for a pointer return 0; }

Referencing Operator &

The "&" operator returns the address of an object:

main.c

main.c

copy
12345678
#include <stdio.h> int main() { int variable; printf("%p\n", &variable); return 0; }

A variable of pointer type is used to store the address, which is returned by the & operator.

To "unpack" the contents at the specified address, you must use the * operator on a variable of type pointer.

main.c

main.c

copy
12345678910
#include <stdio.h> int main() { int variable = 1024; int* pVariable = &variable; printf("Address: %p\n", pVariable); // `%p` specifier for a pointer printf("Returned value by address: %d\n", *(pVariable)); // using `*` to pointer return 0; }
Taak

Swipe to start coding

  1. Declare and initialize any variable with any value;
  2. Declare a pointer to the same data type as your variable;
  3. Assign the address of a variable to a pointer;
  4. Display an address of your variable;
  5. Display the value of the variable by the pointer.

Oplossing

Switch to desktopSchakel over naar desktop voor praktijkervaringGa verder vanaf waar je bent met een van de onderstaande opties
Was alles duidelijk?

Hoe kunnen we het verbeteren?

Bedankt voor je feedback!

close

Awesome!

Completion rate improved to 4.17

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