this function fills memory with a constant byte.
Prototype: char *_memset(char *s, char b, unsigned int n); The _memset() function fills the first n bytes of the memory area pointed to by s with the constant byte b Returns a pointer to the memory area s
this function copies memory area.
Prototype: char *_memcpy(char *dest, char *src, unsigned int n); The _memcpy() function copies n bytes from memory area src to memory area dest Returns a pointer to dest
this functio 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
this function searches a string for any of a set of bytes.
Prototype: char *_strpbrk(char *s, char *accept); The _strpbrk() function locates the first occurrence in the string s of any of the bytes in the string accept Returns a pointer to the byte in s that matches one of the bytes in accept, or NULL if no such byte is found
this function locates a substring.
Prototype: char *_strstr(char *haystack, char *needle); The _strstr() function finds the first occurrence of the substring needle in the string haystack. The terminating null bytes (\0) are not compared Returns a pointer to the beginning of the located substring, or NULL if the substring is not found.
this function prints the chessboard. Prototype: void print_chessboard(char (*a)[8]);
this function prints the sum of the two diagonals of a square matrix of integers. Prototype: void print_diagsums(int *a, int size); Format: see example You are allowed to use the standard library