printf Project

A custom implementation of the printf function in C, providing formatted output similar to the standard library function. This project aims to replicate and expand upon the behavior of printf, allowing for custom format specifiers and enhanced control over output formatting.

Installation

1. Clone the repository:

   git clone https://github.com/MohamedYehia20m/printf.git

2. Change directory

 cd printf

Format

The following format specifiers are supported:

• %c - Character
• %s - String
• %d - Signed integer
• %i - Integer (same as %d)
• %u - Unsigned integer
• %x - Hexadecimal (lowercase)
• %X - Hexadecimal (uppercase)
• %o - Octal
• %p - Pointer address

Examples

Here are some usage examples of the _printf function compared to the standard printf function:

#include <limits.h>
#include <stdio.h>
#include "main.h"

int main(void)
{
    int len;
    int len2;
    unsigned int ui;
    void *addr;
    char *strtest = "ABCD";

    len = _printf("Let's try to printf a simple sentence.\n");
    len2 = printf("Let's try to printf a simple sentence.\n");

    ui = (unsigned int)INT_MAX + 1024;
    addr = (void *)0x7ffe637541f0;

    _printf("Negative Length:[%d, %i]\n", -1 * len, -1 * len);
    printf("Negative Length:[%d, %i]\n", -1 * len2, -1 * len2);

    _printf("Length:[%d, %i]\n", len, len);
    printf("Length:[%d, %i]\n", len2, len2);

    _printf("NULL Length:[%d, %i]\n", NULL, NULL);
    printf("NULL Length:[%d, %i]\n", NULL, NULL);

    _printf("Negative:[%d]\n", -762534);
    printf("Negative:[%d]\n", -762534);

    _printf("Unsigned:[%u]\n", ui);
    printf("Unsigned:[%u]\n", ui);

    _printf("signed:[%u]\n", -100);
    printf("signed:[%u]\n", -100);

    _printf("signed:[%u]\n", -1000);
    printf("signed:[%u]\n", -1000);

    _printf("signed:[%u]\n", -10000);
    printf("signed:[%u]\n", -10000);

    _printf("Unsigned octal:[%o]\n", ui);
    printf("Unsigned octal:[%o]\n", ui);

    _printf("octal:[%o]\n", 100);
    printf("octal:[%o]\n", 100);

    _printf("Unsigned hexadecimal:[%x, %X]\n", ui, ui);
    printf("Unsigned hexadecimal:[%x, %X]\n", ui, ui);

    _printf("hexadecimal:[%x, %X]\n", 100, 100);
    printf("hexadecimal:[%x, %X]\n", 100, 100);

    _printf("Character:[%c]\n", 'H');
    printf("Character:[%c]\n", 'H');

    _printf("String:[%s]\n", "I am a string !");
    printf("String:[%s]\n", "I am a string !");

    _printf("Address:[%p]\n", addr);
    printf("Address:[%p]\n", addr);

    len = _printf("Percent:[%%]\n");
    len2 = printf("Percent:[%%]\n");

    _printf("Len:[%d]\n", len);
    printf("Len:[%d]\n", len2);

    _printf("revert:[%r]\n", strtest);
    printf("revert:[%r]\n", strtest);

    _printf("Unknown:[%r]\n");
    printf("Unknown:[%r]\n");

    _printf("rot13:[%R]\n", strtest);
    printf("rot13:[%R]\n", strtest);

    _printf("binary: %b\n", 98);
    printf("binary: %b\n", 98);

    _printf("%S\n", "Best\nSchool");
    printf("%S\n", "Best\nSchool");

    return (0);
}