C stdlib (stdlib.h) Library
C stdlib Functions
The <stdlib.h> header (standard
library) provides a variety of commonly used functions.
| Function | Description |
|---|---|
| abs() | Return the absolute (positive) value of a whole number |
| atof() | Return a double value from a string representation of a number |
| atoi() | Return an int value from a string representation of a whole number |
| atol() | Return a long int value from a string representation of a whole number
|
| atoll() | Return a long long int value from a string representation of a whole
number |
| calloc() | Allocate dynamic memory and fill it with zeroes |
| div() | Return the quotient and remainder of an integer division |
| exit() | End the program |
| free() | Deallocate dynamic memory |
| malloc() | Allocate dynamic memory |
| qsort() | Sort the contents of an array |
| rand() | Generate a random integer |
| realloc() | Reallocate dynamic memory |
| srand() | Initialize the random number generator |