<cassert>

Contains macros for adding diagnostics that aid program debugging.

<cctype>

Contains function prototypes of functions that test characters for certain properties, and function prototypes for functions that can be used to convert lowercase letters to uppercase letters and vice versa.

<cfloat>

Contains the floating point size limits of the system.

<climits>

Contains the integral size limits of the system.

<cmath>

Contains function prototypes for math library functions.

<cstdio

Contains function prototypes of the C-style standard input/output library functions.

<cstdlib>

Contains function prototypes for conversion of numbers to text, text to numbers, memory allocation, random numbers and various other utility functions.

<cstring>

Contains function prototypes for C-style string processing functions.

<ctime

Contains function prototypes and types for manipulating the time and date.

<iostream>

Contains function prototypes for the C++ standard input and standard output functions.

<iomanip>

Contains function prototypes for stream manipulators that format streams of data.

<fstream>

Contains function prototypes for functions that perform input from files on dist and output to files on disk.

<utility>

Contains classes and functions that are used by many standard library header files.