C++ Programming/headers

C standard headers
These standard headers define functions that were originally defined in the C programming language. They make it much easier to port C code to C++.

These are only some of the many C++'s Standard Headers.

cctype
int isalnum(int c); int isalpha(int c); int iscntrl(int c); int isdigit(int c); int isgraph(int c); int islower(int c); int isspace(int c); int isprint(int c); int isupper(int c);
 * 1) include

cstring
These cstring functions are almost never used by C++ programmers—we use the String class instead.

size_t strlen(char* str); char* strcpy(char* dest, char* src); char* strncpy(char* dest, char* src, size_t length); int strcmp(const char* s1, const char* s2); int strncmp(const char* s1, const char* s2, size_t length); char* strtok(char* str, const char* delim); char* strchr(const char* str, int c); char* strstr(const char* str, const char* within);
 * 1) include

ctime
clock_t clock(void); double difftime(time_t t1, time_t t0); time_t mktime(struct tm *timeptr); time_t time(time_t *timer); char *asctime(struct tm *timeptr); char *ctime(const time_t *timer); struct tm *gmtime(const time_t *timer); struct tm *localtime(const time_t *timer); size_t strftime(char * s, size_t maxsize, const char * format, struct tm * timeptr); clock_t clock(void); double difftime(time_t t1, time_t t0); time_t mktime(struct tm *timeptr); time_t time(time_t *timer); char *asctime(struct tm *timeptr); char *ctime(const time_t *timer); struct tm *gmtime(const time_t *timer); struct tm *localtime(const time_t *timer); size_t strftime(char * s, size_t maxsize, const char * format, struct tm * timeptr);
 * 1) include

cmath
These cmath functions are heavily used in many kinds of physics simulations—such as realistic video games, finite element analysis, etc.

#include

See the book sections regarding Standard C Library Math or the C Programming wikibook Further math page for details on the trig functions and other floating-point functions implemented in this library.

climits
This header lists the maximum and minimum values for all the primitive data types used in C++.

#include

Corresponds to the C language "limits.h".

See C Programming wikibook pages regarding the C99 Reference, and it's Reference table of Standard Headers.