- 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
- You are not allowed to use the standard library. Any use of functions like printf, puts, 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
0. 98 Battery st.
File: 0-reset_to_98.c
Write a function that takes a pointer to an int as parameter and updates the value it points to to 98.
- Prototype: void reset_to_98(int *n);
julien@ubuntu:~/0x05$ cat 0-main.c
#include "holberton.h"
#include <stdio.h>
/**
* main - check the code for Holberton School students.
*
* Return: Always 0.
*/
int main(void)
{
int n;
n = 402;
printf("n=%d\n", n);
reset_to_98(&n);
printf("n=%d\n", n);
return (0);
}
julien@ubuntu:~/0x05$ gcc -Wall -pedantic -Werror -Wextra 0-main.c 0-reset_to_98.c -o 0-98
julien@ubuntu:~/0x05$ ./0-98
n=402
n=98
julien@ubuntu:~/0x05$ 1. Don't swap horses in crossing a stream
File: 1-swap.c
Write a function that swaps the values of two integers.
- Prototype: void swap_int(int *a, int *b);
julien@ubuntu:~/0x05$ cat 1-main.c
#include "holberton.h"
#include <stdio.h>
/**
* main - check the code for Holberton School students.
*
* Return: Always 0.
*/
int main(void)
{
int a;
int b;
a = 98;
b = 42;
printf("a=%d, b=%d\n", a, b);
swap_int(&a, &b);
printf("a=%d, b=%d\n", a, b);
return (0);
}
julien@ubuntu:~/0x05$ gcc -Wall -pedantic -Werror -Wextra 1-main.c 1-swap.c -o 1-swap
julien@ubuntu:~/0x05$ ./1-swap
a=98, b=42
a=42, b=98
julien@ubuntu:~/0x05$2. This report, by its very length, defends itself against the risk of being read
File: 2-strlen.c
Write a function that returns the length of a string.
- Prototype: int _strlen(char *s); FYI: The standard library provides a similar function: strlen. Run man strlen to learn more.
julien@ubuntu:~/0x05$ cat 2-main.c
#include "holberton.h"
#include <stdio.h>
/**
* main - check the code for Holberton School students.
*
* Return: Always 0.
*/
int main(void)
{
char *str;
int len;
str = "Holberton!";
len = _strlen(str);
printf("%d\n", len);
return (0);
}
julien@ubuntu:~/0x05$ gcc -Wall -pedantic -Werror -Wextra 2-main.c 2-strlen.c -o 2-strlen
julien@ubuntu:~/0x05$ ./2-strlen
10
julien@ubuntu:~/0x05$ 3. I do not fear computers. I fear the lack of them
File: 3-puts.c
Write a function that prints a string, followed by a new line, to stdout.
- Prototype: void _puts(char *str); FYI: The standard library provides a similar function: puts. Run man puts to learn more.
julien@ubuntu:~/0x05$ cat 3-main.c
#include "holberton.h"
/**
* main - check the code for Holberton School students.
*
* Return: Always 0.
*/
int main(void)
{
char *str;
str = "I do not fear computers. I fear the lack of them - Isaac Asimov";
_puts(str);
return (0);
}
julien@ubuntu:~/0x05$ gcc -Wall -pedantic -Werror -Wextra _putchar.c 3-main.c 3-puts.c -o 3-puts
julien@ubuntu:~/0x05$ ./3-puts
I do not fear computers. I fear the lack of them - Isaac Asimov
julien@ubuntu:~/0x05$ 4. I can only go one way. I've not got a reverse gear
File: 4-print_rev.c
Write a function that prints a string, in reverse, followed by a new line.
- Prototype: void print_rev(char *s);
julien@ubuntu:~/0x05$ cat 4-main.c
#include "holberton.h"
/**
* main - check the code for Holberton School students.
*
* Return: Always 0.
*/
int main(void)
{
char *str;
str = "I do not fear computers. I fear the lack of them - Isaac Asimov";
print_rev(str);
return (0);
}
julien@ubuntu:~/0x05$ gcc -Wall -pedantic -Werror -Wextra _putchar.c 4-main.c 4-print_rev.c -o 4-print_rev
julien@ubuntu:~/0x05$ ./4-print_rev
vomisA caasI - meht fo kcal eht raef I .sretupmoc raef ton od I
julien@ubuntu:~/0x05$ 5. A good engineer thinks in reverse and asks himself about the stylistic consequences of the components and systems he proposes
File: 5-rev_string.c
Write a function that reverses a string.
- Prototype: void rev_string(char *s);
julien@ubuntu:~/0x05$ cat 5-main.c
#include "holberton.h"
#include <stdio.h>
/**
* main - check the code for Holberton School students.
*
* Return: Always 0.
*/
int main(void)
{
char s[10] = "Holberton";
printf("%s\n", s);
rev_string(s);
printf("%s\n", s);
return (0);
}
julien@ubuntu:~/0x05$ gcc -Wall -pedantic -Werror -Wextra 5-main.c 5-rev_string.c -o 5-rev_string
julien@ubuntu:~/0x05$ ./5-rev_string
Holberton
notrebloH
julien@ubuntu:~/0x05$6. Half the lies they tell about me aren't true
File:6-puts2.c
Write a function that prints every other character of a string, starting with the first character, followed by a new line.
- Prototype: void puts2(char *str);
julien@ubuntu:~/0x05$ cat 6-main.c
#include "holberton.h"
/**
* main - check the code for Holberton School students.
*
* Return: Always 0.
*/
int main(void)
{
char *str;
str = "0123456789";
puts2(str);
return (0);
}
julien@ubuntu:~/0x05$ gcc -Wall -pedantic -Werror -Wextra _putchar.c 6-main.c 6-puts2.c -o 6-puts2
julien@ubuntu:~/0x05$ ./6-puts2
02468
julien@ubuntu:~/0x05$ 7. Winning is only half of it. Having fun is the other half
File: 7-puts_half.c
Write a function that prints half of a string, followed by a new line.
- Prototype: void puts_half(char *str);
- The function should print the second half of the string
- If the number of characters is odd, the function should print the last n characters of the string, where n = (length_of_the_string - 1) / 2
julien@ubuntu:~/0x05$ cat 7-main.c
#include "holberton.h"
/**
* main - check the code for Holberton School students.
*
* Return: Always 0.
*/
int main(void)
{
char *str;
str = "0123456789";
puts_half(str);
return (0);
}
julien@ubuntu:~/0x05$ gcc -Wall -pedantic -Werror -Wextra _putchar.c 7-main.c 7-puts_half.c -o 7-puts_half
julien@ubuntu:~/0x05$ ./7-puts_half
56789
julien@ubuntu:~/0x05$8. Arrays are not pointers
File: 8-print_array.c
Write a function that prints n elements of an array of integers, followed by a new line.
- Prototype: void print_array(int *a, int n);
- where n is the number of elements of the array to be printed
- Numbers must be separated by comma, followed by a space
- The numbers should be displayed in the same order as they are stored in the array
- You are allowed to use printf
julien@ubuntu:~/0x05$ cat 8-main.c
#include "holberton.h"
/**
* main - check the code for Holberton School students.
*
* Return: Always 0.
*/
int main(void)
{
int array[5];
array[0] = 98;
array[1] = 402;
array[2] = -198;
array[3] = 298;
array[4] = -1024;
print_array(array, 5);
return (0);
}
julien@ubuntu:~/0x05$ gcc -Wall -pedantic -Werror -Wextra 8-main.c 8-print_array.c -o 8-print_array
julien@ubuntu:~/0x05$ ./8-print_array
98, 402, -198, 298, -1024
julien@ubuntu:~/0x05$9. strcpy
File: 9-strcpy.c
-
Prototype: char *_strcpy(char *dest, char *src); Write a function that copies the string pointed to by src, including the terminating null byte (\0), to the buffer pointed to by dest.
-
Return value: the pointer to dest FYI: The standard library provides a similar function: strcpy. Run man strcpy to learn more.
julien@ubuntu:~/0x05$ cat 9-main.c
#include "holberton.h"
#include <stdio.h>
/**
* main - check the code for Holberton School students.
*
* Return: Always 0.
*/
int main(void)
{
char s1[98];
char *p;
p = _strcpy(s1, "First, solve the problem. Then, write the code\n");
printf("%s", s1);
printf("%s", p);
return (0);
}
julien@ubuntu:~/0x05$ gcc -Wall -pedantic -Werror -Wextra 9-main.c 9-strcpy.c -o 9-strcpy
julien@ubuntu:~/0x05$ ./9-strcpy
First, solve the problem. Then, write the code
First, solve the problem. Then, write the code
julien@ubuntu:~/0x05$