Name	Name	Last commit message	Last commit date
parent directory ..
0-main.c	0-main.c
0.jpg	0.jpg
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1-init_dog.c	1-init_dog.c
1-main.c	1-main.c
2-main.c	2-main.c
2-print_dog.c	2-print_dog.c
2-print_dog.c_old	2-print_dog.c_old
2.jpg	2.jpg
3-main.c	3-main.c
3.jpg	3.jpg
4-main.c	4-main.c
4-new_dog.c	4-new_dog.c
4.jpg	4.jpg
5-free_dog.c	5-free_dog.c
5-main.c	5-main.c
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README.md	README.md
a	a
b	b
c	c
d	d
dog.h	dog.h
e	e
f	f
main.h	main.h

0x0E. C - Structures, typedef

C

Resources

Read or watch:

0x0d. Structures.pdf

struct (C programming language)

Documentation: structures

0x0d. Typedef and structures.pdf

typedef

Programming in C by Stephen Kochan - Chapter 8, Working with Structures p163-189

The Lost Art of C Structure Packing (Advanced - not mandatory)

Learning Objectives

-At the end of this project, you are expected to be able to explain to anyone, without the help of Google:

General

-What are structures, when, why and how to use them -How to use typedef

Copyright - Plagiarism

You are tasked to come up with solutions for the tasks below yourself to meet with the above learning objectives. You will not be able to meet the objectives of this or any following project by copying and pasting someone else’s work.

You are not allowed to publish any content of this project.

Any form of plagiarism is strictly forbidden and will result in removal from the program.

Requirements

General

Allowed editors: vi, vim, emacs

All your files will be compiled on Ubuntu 20.04 LTS using gcc, using the options -Wall -Werror -Wextra -pedantic -std=gnu89

All your files should end with a new line

A README.md file, at the root of the folder of the project is mandatory

Your code should use the Betty style. It will be checked using betty-style.pl and betty-doc.pl

You are not allowed to use global variables

No more than 5 functions per file

The only C standard library functions allowed are printf, malloc, free and exit.

In the following examples, the main.c files are shown as examples. You can use them to test your functions, but you don’t have to push them to your repo (if you do we won’t take them into account). We will use our own main.c files at compilation. Our main.c files might be different from the one shown in the examples

Don’t forget to push your header file
All your header files should be include guarded

Tasks

0. Poppy (mandatory)

Define a new type struct dog with the following elements:

name, type = char *

age, type = float

owner, type = char *

julien@ubuntu:~/0x0d. structures, typedef$ cat 0-main.c
#include <stdio.h>
#include "dog.h"

/**
 * main - check the code
 *
 * Return: Always 0.
 */
int main(void)
{
    struct dog my_dog;

    my_dog.name = "Poppy";
    my_dog.age = 3.5;
    my_dog.owner = "Bob";
    printf("My name is %s, and I am %.1f :) - Woof!\n", my_dog.name, my_dog.age);
    return (0);
}
julien@ubuntu:~/0x0d. structures, typedef$ gcc -Wall -pedantic -Werror -Wextra -std=gnu89 0-main.c -o a
julien@ubuntu:~/0x0d. structures, typedef$ ./a 
My name is Poppy, and I am 3.5 :) - Woof!
julien@ubuntu:~/0x0d. structures, typedef$

Repo:

GitHub repository: alx-low_level_programming

Directory: 0x0E-structures_typedef

File: dog.h

1. A dog is the only thing on earth that loves you more than you love yourself (mandatory)

Write a function that initialize a variable of type struct dog

Prototype: void init_dog(struct dog *d, char *name, float age, char *owner);

julien@ubuntu:~/0x0d. structures, typedef$ cat 1-main.c
#include <stdio.h>
#include "dog.h"

/**
 * main - check the code
 *
 * Return: Always 0.
 */
int main(void)
{
    struct dog my_dog;

    init_dog(&my_dog, "Poppy", 3.5, "Bob");
    printf("My name is %s, and I am %.1f :) - Woof!\n", my_dog.name, my_dog.age);
    return (0);
}
julien@ubuntu:~/0x0d. structures, typedef$ gcc -Wall -pedantic -Werror -Wextra -std=gnu89 1-main.c 1-init_dog.c -o b
julien@ubuntu:~/0x0d. structures, typedef$ ./b 
My name is Poppy, and I am 3.5 :) - Woof!
julien@ubuntu:~/0x0d. structures, typedef$

Repo:

GitHub repository: alx-low_level_programming

Directory: 0x0E-structures_typedef

File: 1-init_dog.c

2. A dog will teach you unconditional love. If you can have that in your life, things won't be too bad (mandatory)

Write a function that prints a struct dog

Prototype: void print_dog(struct dog *d);

Format: see example bellow

You are allowed to use the standard library

If an element of d is NULL, print (nil) instead of this element. (if name is NULL, print Name: (nil))

If d is NULL print nothing.

julien@ubuntu:~/0x0d. structures, typedef$ cat 2-main.c
#include <stdio.h>
#include "dog.h"

/**
 * main - check the code
 *
 * Return: Always 0.
 */
int main(void)
{
    struct dog my_dog;

    my_dog.name = "Poppy";
    my_dog.age = 3.5;
    my_dog.owner = "Bob";
    print_dog(&my_dog);
    return (0);
}
julien@ubuntu:~/0x0d. structures, typedef$ gcc -Wall -pedantic -Werror -Wextra -std=gnu89 2-main.c 2-print_dog.c -o c
julien@ubuntu:~/0x0d. structures, typedef$ ./c 
Name: Poppy
Age: 3.500000
Owner: Bob
julien@ubuntu:~/0x0d. structures, typedef$

Repo:

GitHub repository: alx-low_level_programming

Directory: 0x0E-structures_typedef

File: 2-print_dog.c

3. Outside of a dog, a book is a man's best friend. Inside of a dog it's too dark to read (mandatory)

Define a new type dog_t as a new name for the type struct dog.

julien@ubuntu:~/0x0d. structures, typedef$ cat 3-main.c
#include <stdio.h>
#include "dog.h"

/**
 * main - check the code
 *
 * Return: Always 0.
 */
int main(void)
{
    dog_t my_dog;

    my_dog.name = "Poppy";
    my_dog.age = 3.5;
    my_dog.owner = "Bob";
    printf("My name is %s, and I am %.1f :) - Woof!\n", my_dog.name, my_dog.age);
    return (0);
}
julien@ubuntu:~/0x0d. structures, typedef$ gcc -Wall -pedantic -Werror -Wextra -std=gnu89 3-main.c -o d
julien@ubuntu:~/0x0d. structures, typedef$ ./d 
My name is Poppy, and I am 3.5 :) - Woof!
julien@ubuntu:~/0x0d. structures, typedef$

Repo:

GitHub repository: alx-low_level_programming

Directory: 0x0E-structures_typedef

File: dog.h

4. A door is what a dog is perpetually on the wrong side of (mandatory)

Write a function that creates a new dog.

Prototype: dog_t *new_dog(char *name, float age, char *owner);

You have to store a copy of name and owner

Return NULL if the function fails

julien@ubuntu:~/0x0d. structures, typedef$ cat 4-main.c
#include <stdio.h>
#include "dog.h"

/**
 * main - check the code
 *
 * Return: Always 0.
 */
int main(void)
{
    dog_t *my_dog;

    my_dog = new_dog("Poppy", 3.5, "Bob");
    printf("My name is %s, and I am %.1f :) - Woof!\n", my_dog->name, my_dog->age);
    return (0);
}
julien@ubuntu:~/0x0d. structures, typedef$ gcc -Wall -pedantic -Werror -Wextra -std=gnu89 4-main.c 4-new_dog.c -o e
julien@ubuntu:~/0x0d. structures, typedef$ ./e
My name is Poppy, and I am 3.5 :) - Woof!
julien@ubuntu:~/0x0d. structures, typedef$

Repo:

GitHub repository: alx-low_level_programming

Directory: 0x0E-structures_typedef

File: 4-new_dog.c

5. How many legs does a dog have if you call his tail a leg? Four. Saying that a tail is a leg doesn't make it a leg (mandatory)

Write a function that frees dogs.

Prototype: void free_dog(dog_t *d);

julien@ubuntu:~/0x0d. structures, typedef$ cat 5-main.c
#include <stdio.h>
#include "dog.h"

/**
 * main - check the code
 *
 * Return: Always 0.
 */
int main(void)
{
    dog_t *my_dog;

    my_dog = new_dog("Poppy", 3.5, "Bob");
    printf("My name is %s, and I am %.1f :) - Woof!\n", my_dog->name, my_dog->age);
    free_dog(my_dog);
    return (0);
}
julien@ubuntu:~/0x0d. structures, typedef$ gcc -Wall -pedantic -Werror -Wextra -std=gnu89 5-main.c 5-free_dog.c 4-new_dog.c -o f
julien@ubuntu:~/0x0d. structures, typedef$ valgrind ./f
==22840== Memcheck, a memory error detector
==22840== Copyright (C) 2002-2015, and GNU GPL'd, by Julian Seward et al.
==22840== Using Valgrind-3.11.0 and LibVEX; rerun with -h for copyright info
==22840== Command: ./f
==22840== 
My name is Poppy, and I am 3.5 :) - Woof!
==22840== 
==22840== HEAP SUMMARY:
==22840==     in use at exit: 0 bytes in 0 blocks
==22840==   total heap usage: 4 allocs, 4 frees, 1,059 bytes allocated
==22840== 
==22840== All heap blocks were freed -- no leaks are possible
==22840== 
==22840== For counts of detected and suppressed errors, rerun with: -v
==22840== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
julien@ubuntu:~/0x0d. structures, typedef$

Repo:

GitHub repository: alx-low_level_programming

Directory: 0x0E-structures_typedef

File: 5-free_dog.c

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0x0E. C - Structures, typedef

C

Resources

Learning Objectives

General

Copyright - Plagiarism

Requirements

General

Tasks

0. Poppy (mandatory)

Define a new type struct dog with the following elements:

Repo:

1. A dog is the only thing on earth that loves you more than you love yourself (mandatory)

Write a function that initialize a variable of type struct dog

Repo:

2. A dog will teach you unconditional love. If you can have that in your life, things won't be too bad (mandatory)

Write a function that prints a struct dog

Repo:

3. Outside of a dog, a book is a man's best friend. Inside of a dog it's too dark to read (mandatory)

Define a new type dog_t as a new name for the type struct dog.

Repo:

4. A door is what a dog is perpetually on the wrong side of (mandatory)

Write a function that creates a new dog.

Repo:

5. How many legs does a dog have if you call his tail a leg? Four. Saying that a tail is a leg doesn't make it a leg (mandatory)

Write a function that frees dogs.

Repo:

Files

0x0E-structures_typedef

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README.md

0x0E. C - Structures, typedef

C

Resources

Learning Objectives

General

Copyright - Plagiarism

Requirements

General

Tasks

0. Poppy (mandatory)

Define a new type struct dog with the following elements:

Repo:

1. A dog is the only thing on earth that loves you more than you love yourself (mandatory)

Write a function that initialize a variable of type struct dog

Repo:

2. A dog will teach you unconditional love. If you can have that in your life, things won't be too bad (mandatory)

Write a function that prints a struct dog

Repo:

3. Outside of a dog, a book is a man's best friend. Inside of a dog it's too dark to read (mandatory)

Define a new type dog_t as a new name for the type struct dog.

Repo:

4. A door is what a dog is perpetually on the wrong side of (mandatory)

Write a function that creates a new dog.

Repo:

5. How many legs does a dog have if you call his tail a leg? Four. Saying that a tail is a leg doesn't make it a leg (mandatory)

Write a function that frees dogs.

Repo: