char *_strchr(char *s, char c)

Write a function that locates a character in a string.Prototype: char *_strchr(char *s, char c);Returns a pointer to the first occurrence of the character c in the string s, or NULL if the character is not found

#ifndef main.h#define main.h#include <stddef.h>int _putchar(char c);int _islower(int c);int _isalpha(int c);int _abs(int n);int _isupper(int c);int _isdigit(int c);int _strlen(char *s);void _puts(char *s);char *_strcpy(char *dest, char *src);int _atoi(char *s);char *_strcat(char *dest, char *src);char *_strncat(char *dest, char *src, int n);char *_strncpy(char *dest, char *src, int n);int _strcmp(char *s1, char *s2);char *_memset(char *s, char b, unsigned int n);char *_memcpy(char *dest, char *src, unsigned int n);char *_strchr(char *s, char c);unsigned int _strspn(char *s, char *accept);char *_strpbrk(char *s, char *accept);char *_strstr(char *haystack, char *needle);#endif main.h~ ~ ~

#include <stdio.h> #include <string.h> int main() { char *str = "hello, world"; char str1[9]; strncpy(str1, str, 9); printf("%s %d", str1, strlen(str1)); }

What is the first argument of the strcat() function in C programming?

What is the output of the following code ?#include <stdio.h>#include <string.h>int main() {    char str1[] = "Hello";    char str2[] = "World";    char str3[20];    strcpy(str3, strrev(strcat(str1, str2)));    printf("%s", str3);    return 0;}