0x0D-preprocessor

Requirements

General

• Allowed editors: vi, vim, emacs
• All your files will be compiled on Ubuntu 14.04 LTS
• Your programs and functions will be compiled with gcc 4.8.4 using the flags -Wall -Werror -Wextra and -pedantic
• 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 malloc, free and exit. Any use of functions like printf, puts, calloc, realloc etc… is forbidden
• You are allowed to use _putchar
• You don’t have to push _putchar.c, we will use our file. If you do it won’t be taken into account
• 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
• The prototypes of all your functions and the prototype of the function _putchar should be included in your header file called holberton.h
• Don’t forget to push your header file
• All your header files should be include guarded

Tasks

0. Object-like Macro

File: 0-object_like_macro.h

Create a header file that defines a macro named SIZE as an abbreviation for the token 1024.

julien@ubuntu:~/0x0c. macro, structures$ cat 0-main.c
#include "0-object_like_macro.h"
#include "0-object_like_macro.h"
#include <stdio.h>

/**
 * main - check the code for Holberton School students.
 *
 * Return: Always 0.
 */
int main(void)
{
    int s;

    s = 98 + SIZE;
    printf("%d\n", s);
    return (0);
}
julien@ubuntu:~/0x0c. macro, structures$ gcc -Wall -pedantic -Werror -Wextra 0-main.c -o a
julien@ubuntu:~/0x0c. macro, structures$ ./a 
1122
julien@ubuntu:~/0x0c. macro, structures$

1. Pi

File: 1-pi.h

Create a header file that defines a macro named PI as an abbreviation for the token 3.14159265359.

julien@ubuntu:~/0x0c. macro, structures$ cat 1-main.c
#include "1-pi.h"
#include "1-pi.h"
#include <stdio.h>

/**
 * main - check the code for Holberton School students.
 *
 * Return: Always 0.
 */
int main(void)
{
    float a;
    float r;

    r = 98;
    a = PI * r * r;
    printf("%.3f\n", a);
    return (0);
}
julien@ubuntu:~/0x0c. macro, structures$ gcc -Wall -pedantic -Werror -Wextra 1-main.c -o b
julien@ubuntu:~/0x0c. macro, structures$ ./b
30171.855
julien@ubuntu:~/0x0c. macro, structures$ 

2. File name

File: 2-main.c

Write a program that prints the name of the file it was compiled from, followed by a new line.

• You are allowed to use the standard library

julien@ubuntu:~/0x0c. macro, structures$ gcc -Wall -pedantic -Werror -Wextra 2-main.c -o c
julien@ubuntu:~/0x0c. macro, structures$ ./c 
2-main.c
julien@ubuntu:~/0x0c. macro, structures$ cp 2-main.c 02-main.c
julien@ubuntu:~/0x0c. macro, structures$ gcc -Wall -pedantic -Werror -Wextra 02-main.c -o cc
julien@ubuntu:~/0x0c. macro, structures$ ./cc
02-main.c
julien@ubuntu:~/0x0c. macro, structures$ 

3. Function-like macro

File: 3-function_like_macro.h

Write a function-like macro ABS(x) that computes the absolute value of a number x.

julien@ubuntu:~/0x0c. macro, structures$ cat 3-main.c
#include <stdio.h>
#include "3-function_like_macro.h"
#include "3-function_like_macro.h"

/**
 * main - check the code for Holberton School students.
 *
 * Return: Always 0.
 */
int main(void)
{
    int i;
    int j;

    i = ABS(-98) * 10;
    j = ABS(98) * 10;
    printf("%d, %d\n", i, j);
    return (0);
}
julien@ubuntu:~/0x0c. macro, structures$ gcc -Wall -pedantic -Werror -Wextra 3-main.c -o d
julien@ubuntu:~/0x0c. macro, structures$ ./d 
980, 980
julien@ubuntu:~/0x0c. macro, structures$ 

4. SUM

File: 4-sum.h

Write a function-like macro SUM(x, y) that computes the sum of the numbers x and y.

julien@ubuntu:~/0x0c. macro, structures$ cat 4-main.c
#include <stdio.h>
#include "4-sum.h"
#include "4-sum.h"

/**
 * main - check the code for Holberton School students.
 *
 * Return: Always 0.
 */
int main(void)
{
    int s;

    s = SUM(98, 1024);
    printf("%d\n", s);
    return (0);
}
julien@ubuntu:~/0x0c. macro, structures$ gcc -Wall -pedantic -Werror -Wextra 4-main.c -o e
julien@ubuntu:~/0x0c. macro, structures$ ./e 
1122
julien@ubuntu:~/0x0c. macro, structures$