Standard library header <cstdlib>
From cppreference.com
                    
                                        
                    
                    
                                                            
                    This header was originally in the C standard library as <stdlib.h>.
This header provides miscellaneous utilities. Symbols defined here are used by several library components.
| 
 Macros | ||
| indicates program execution execution status (macro constant) | ||
| maximum possible value generated by std::rand (macro constant) | ||
| Classes | ||
| div_t | the quotient and remainder of integer division (struct) | |
| Functions | ||
| Process control | ||
| causes abnormal program termination (without cleaning up) (function) | ||
| causes normal program termination with cleaning up (function) | ||
| (C++11) | causes normal program termination without completely cleaning up (function) | |
| (C++11) | causes normal program termination without cleaning up (function) | |
| registers a function to be called on exit() invocation (function) | ||
| (C++11) | registers a function to be called on quick_exit invocation (function) | |
| calls the host environment's command processor (function) | ||
| access to the list of environment variables (function) | ||
| Memory management | ||
| allocates memory (function) | ||
| allocates and zeroes memory (function) | ||
| expands previously allocated memory block (function) | ||
| deallocates previously allocated memory (function) | ||
| Numeric string conversion | ||
| converts a byte string to a floating point value (function) | ||
| converts a byte string to an integer value (function) | ||
| converts a byte string to an integer value (function) | ||
| converts a byte string to an unsigned integer value (function) | ||
| converts a byte string to a floating point value (function) | ||
| Wide string manimpulation | ||
| returns the number of bytes in the next multibyte character (function) | ||
| converts the next multibyte character to wide character (function) | ||
| converts a wide character to its multibyte representation (function) | ||
| converts a narrow multibyte character string to wide string (function) | ||
| converts a wide string to narrow multibyte character string (function) | ||
| Miscellaneous algorithms and math | ||
| generates a pseudo-random number (function) | ||
| seeds pseudo-random number generator (function) | ||
| sorts a range of elements with unspecified type (function) | ||
| searches an array for an element of unspecified type (function) | ||
| computes absolute value of an integral value (|x|) (function) | ||
| the quotient and remainder of integer division (function) | ||