// <string.h>: the C string functions, UNIX Programmer's Manual vol 1 section 3 extern char* strcat(char*, const char*); extern char* strncat(char*, const char*, int); extern int strcmp(const char*, const char*); extern int strncmp(const char*, const char*, int); extern char* strcpy(char*, const char*); extern char* strncpy(char*, const char*, int); extern int strlen(const char*); // bsd: //extern char* index(char*, int); //extern char* rindex(char*, int); // system V: //extern char* strchr(char*, char); //extern char* strrchr(char*, char); //extern char* strpbrk(char*, char*); //extern int strspn(char*, char*); //extern int strcspn(char*, char*); //extern char* strtok(char*, char*);