ft_putstr — Print a String

Allowed functions: write

Write a function that displays a string on the standard output.

The pointer passed to the function contains the address of the string's first character.

void	ft_putstr(char *str);

Solution

Download ft_putstr.c

#include <unistd.h>

void ft_putstr(char *str) {

	while (*str) {
		write(1, str, 1);

		str++;
	}
}

How It Works

Goal: Display a string to standard output one character at a time.

Approach: Loop through the string using a pointer, writing each character until the null terminator.

Step by step:

1. Dereference the pointer to check if the current character is not '\0'.
2. Write the current character to stdout.
3. Increment the pointer to move to the next character and repeat.

Key concept: Pointer dereferencing and while loops — using *str to access the value at a pointer and incrementing the pointer to traverse a string.