char *strcat(char *__s1, const char *__s2);
char *strchr(const char *__s, int c);
int strcmp(const char *s1, const char *__s2);
int strcoll(const char *__s1, const char *__s2);
char *strcpy(char *__dst, const char *__src);
size_t strcspn(const char *__s, const char *__charset);
char *strerror(int errnum) __DARWIN_ALIAS(strerror);
size_t strlen(const char *s);
char *strncat(char *__s1, const char *__s2, size_t n);
int strncmp(const char *s1, const char *__s2, size_t n);
char *strncpy(char *dst, const char *__src, size_t n);
char *strpbrk(const char *s, const char *__charset);
char *strrchr(const char *__s, int c);
size_t strspn(const char *s, const char *__charset);
char *strstr(const char *__big, const char *__little);
char *strtok(char *__str, const char *__sep);
请问这些函数名的英文含义,不然很难记住。比如strcmp是string compare。请大家指点指点。