Header <string.h>

Functions provided by this header:

void *memcpy(void *dest, const void *src, size_t count)
void *memset(void *b, int c, size_t len)
char *strchr(const char *str, int ch)
int strcmp(const char *lhs, const char *rhs)
int strncmp(const char *lhs, const char *rhs, size_t n)
size_t strlen(const char *str)
char *strncpy(char *dst, const char *src, size_t len)