This directory contains C programs that focus on pointers, arrays, and strings. 👨💻🔢📜
Description: The 0-memset.c program defines a function _memset that fills the first n bytes of the memory area pointed to by s with the constant byte b. It returns a pointer to the memory area s. 🧼
- Prototype:
char *_memset(char *s, char b, unsigned int n); - Standard Library Function:
memset
Description: The 1-memcpy.c program defines a function _memcpy that copies n bytes from the memory area src to the memory area dest. It returns a pointer to dest. 📝
- Prototype:
char *_memcpy(char *dest, char *src, unsigned int n); - Standard Library Function:
memcpy
Description: The 2-strchr.c program defines a function _strchr that searches for the first occurrence of the character c in the string s. It returns a pointer to the first occurrence of c in s or NULL if the character is not found. 🔍
- Prototype:
char *_strchr(char *s, char c); - Standard Library Function:
strchr
Description: The 3-strspn.c program defines a function _strspn that gets the length of a prefix substring. It returns the number of bytes in the initial segment of s that consist only of bytes from accept. 📏
- Prototype:
unsigned int _strspn(char *s, char *accept); - Standard Library Function:
strspn
Description: The 4-strpbrk.c program defines a function _strpbrk that searches a string for any of a set of bytes. It locates the first occurrence in the string s of any of the bytes in the string accept. It returns a pointer to the byte in s that matches one of the bytes in accept or NULL if no such byte is found. 🔎
- Prototype:
char *_strpbrk(char *s, char *accept); - Standard Library Function:
strpbrk
Description: The 5-strstr.c program defines a function _strstr that finds the first occurrence of the substring needle in the string haystack. The terminating null bytes (\0) are not compared. It returns a pointer to the beginning of the located substring or NULL if the substring is not found. 🔍📜
- Prototype:
char *_strstr(char *haystack, char *needle); - Standard Library Function:
strstr
Description: The 7-print_chessboard.c program defines a function print_chessboard that prints a chessboard represented as a 2D array of characters. ♟️♖📦
- Prototype:
void print_chessboard(char (*a)[8]);
Description: The 8-print_diagsums.c program defines a function print_diagsums that prints the sum of the two diagonals of a square matrix of integers. 🔢➕🔢
- Prototype:
void print_diagsums(int *a, int size);
Description: The 100-set_string.c program defines a function set_string that sets the value of a pointer to a char. 🆕🎩🔤
- Prototype:
void set_string(char **s, char *to);