add function ft_strchr

Makefile

@@ -1,6 +1,7 @@
 NAME = libft.a
 SRC = ft_strlen.c ft_isalpha.c ft_isdigit.c ft_isalnum.c ft_isascii.c ft_isprint.c ft_memset.c\
-ft_bzero.c ft_memcpy.c ft_memmove.c ft_toupper.c ft_tolower.c ft_strlcpy.c ft_strlcat.c
+ft_bzero.c ft_memcpy.c ft_memmove.c ft_toupper.c ft_tolower.c ft_strlcpy.c ft_strlcat.c\
+ft_strchr.c
 OBJS = ${SRC:.c=.o}
 HEADER = include/libft.h
 INCLUDE = -I include

ft_strchr.c

@@ -0,0 +1,35 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_strchr.c                                        :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: mbrito-p <[email protected]>          +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2023/04/17 20:33:14 by mbrito-p          #+#    #+#             */
+/*   Updated: 2023/04/17 20:41:01 by mbrito-p         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+// The strchr function in C is used to search a given string 
+// (i.e., a sequence of characters) for the first occurrence 
+// of a specified character.The str parameter is a pointer to the string 
+// in which the search is to be performed. 
+// The c parameter is the character that you want to search for in the string.
+// The function returns a pointer to the first occurrence 
+// of the character c in the string str. If the character 
+// is not found, the function returns NULL.
+#include "libft.h"
+
+char *ft_strchr(const char *s, int c)
+{
+	while (*s != '\0') {
+        if (*s == c) {
+            return (char *)s;
+        }
+        s++;
+    }
+    if (*s == c) {
+        return (char *)s;
+    }
+    return NULL;
+}

include/libft.h

@@ -26,4 +26,5 @@ int ft_toupper(int c);
 int	ft_tolower(int c);
 size_t ft_strlcpy(char *dst, const char *src, size_t size);
 size_t ft_strlcat(char *dst, const char *src, size_t size); 
+char *ft_strchr(const char *s, int c);
 #endif

main.c

@@ -6,20 +6,19 @@
 /*   By: mbrito-p <[email protected]>          +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/04/12 20:20:59 by mbrito-p          #+#    #+#             */
-/*   Updated: 2023/04/14 20:57:10 by mbrito-p         ###   ########.fr       */
+/*   Updated: 2023/04/17 20:41:41 by mbrito-p         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
 #include "libft.h"
 
-int main(void)
-{
-    char str1[20] = "Hello, ";
-    char *str2 = "world!";
-    size_t dest_size = sizeof(str1);
-    size_t result = ft_strlcat(str1, str2, dest_size);
-    printf("Result: %zu, Destination string: %s\n", result, str1);
-
-    return 0;
-}
-
+int main() {
+   char str[] = "hello world";
+   char *ptr = ft_strchr(str, 'w');
+   if (ptr != NULL) {
+      printf("The character 'w' was found in the string at position %ld.\n", ptr - str);
+   } else {
+      printf("The character 'w' was not found in the string.\n");
+   }
+   return 0;
+}