💻 _printf.c: This is the main code, of our custom function, it's a replica of the printf function.
💻 function_declaration.c: Contains all the functions that are call in our _printf.c file.
💻 main.h: It's the header file, contains the prototype to our functions.
💻 man_3_printf: This file contains the man page for the function _printf.
The function _printf main focus is to print an output according to a certain format. Different ways to print an output is with the use of a format specifier.
A format specifier in c are used to take input and print the output of a type. The symbol we use in every format specifier is %. The specifier tells the compiler about the type of data that most be given or input and the type of data that most be printed on the screen.
| Format Specifier | Used for... |
|---|---|
| %% | Write a function that returns the sum of all its parameters. |
| %i, %d | Write a function that prints numbers, followed by a new line. |
| %s | Write a function that prints strings, followed by a new line. |
| %c | Write a function that prints anything. |
Example for char: Example for string: Example for digit: Example for interger:
Input: _printf("%c", H); Input: _printf("%s", "hello"); Input: _printf("%d", 13); Input: _printf("%i", 45);
Output: H Output: hello Output: 13 Output: 45
Upon successful return, these functions return the number of character printed (excluding the null byte used to end output to string). If an output error is encountered, a negative value is returned.
The language we use for the creation of _printf() is the C language. This low level language allow us to create and control function from scratch and define its output. We are currently in our foundation trimester of C language and we are testing our knowledge by building the _print() from scratch.
All the files that were used are compiled using:
gcc -Wall -Werror -Wextra -pedantic -std=gnu89 -Wno-format *.c
The challenges we faced are the following:
- Finding the edge cases. This was done by purposely breaking the function and finding a solution.
- The creation of the function to print intergers.
- Trying to create a function with the little information that was given to us.
Solving these challenges helped us to develop critical thinking and emphasize collaboration.
This function work similar to .
Hi, Im Lizbeth Garcia on of the developer behind this project. To connect with me professionaly and explore more about my work, I invite you to visit my LinkedIn profile (Lizbeth Garcia ). There, you can find articles, and professional experiences. For more casual discussion and tech insight, feel free to follow me on Twitter (@GarlebLizz) or Instagram (@CodewithLizz). I look foward to connecting with you!
Hey, Im Guillemro Rosario one of the developer behind this project. You can find me on LinkedIn (Guillermo Rosario)