FUNCTION _printf

_printf is a simpler printf function.
It prints single strings of characters, and can handle variadic arguments like ints, chars or strings.

Doubles and floats types are not implemented yet.

Compilation command :
_printf is written in C language and needs to be compiled.\

Several files are needed :
print_types.c provides functions to handle variadic arguments.
is_known.c contains a function to check if the character following % is a specifier
_putchar.c contains a custom implementation of putchar : it prints a single character
pow_recursion.c a custom implementation of pow function. It is used by print_type to print integers.
printf.c contains the function itself\

Note that you will need to create your own main.c file.

To compile printf, use the following command :

"*.c" means you all C files in the current directory are inclued in the compilations. Be careful not to create several main files.

gcc -Wall -Werror -Wextra -pedantic -std=gnu89 -Wno-format *.c
./a.out

This creates an executable file named a.out. Consider you can choose the name of your executable :

gcc -Wall -Werror -Wextra -pedantic -std=gnu89 -Wno-format *.c -o executable_name
./executable_name

Make sure gcc is on your computer.

Documentation

If you need help, you can access the manpage using this command :

man ./_printf.3

Flowchart

The following flowchart explains how the function works. It's written in an understandable way.

Examples

Here are some examples of how to use _printf.

printf("Hello !\n");
printf("Hello %s !\n", "Vincent");
printf("There is %d candy.\n", 3);
printf("%d %% discount on shirts.\n", 30);
printf("There is %d %s in %c size.\n", 10, shirts, 'S');

Here are the results on standard output :

Hello !
Hello Vincent !
There is 3 candy.
30 % discount on shirts.
There is 10 shirts in S size.

Note that instead of constant values like "10", "Vincent", etc. variables can be passed to _printf. Use the right specifier according to

Testing

This function has been tested with files in the "Tests" directory.
main_test.c evolved according to different steps of development - even though the current version of main_test does not demonstrate all steps of the workflow. Here are the different steps followed during workflow :\

1. testing functions like _putchar and is_known\
2. testing a simple string with no specifier\
3. testing %c and creating variables to check length return\
4. testing %s\
5. testing printf(NULL) and check the return (-1)\
6. testing unknown specifiers\
7. testing % alone and check the return (-1)\
8. testing %i and %d\
9. testing negative numbers

Authors

Mathieu Majérus - wrote code, manpage, readme.md, flowchart\