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Source Code Standard Types div_t jmp_buf ldiv_t ptrdiff_t size_t va_list wchar_t Routines By Category Buffer Manipulation Routines Character Routines Data Conversion Routines Math Routines Memory Allocation Routines Stream I/O Routines String Routines Variable Length Argument Routines Miscellaneous Routines Include Files SFR Definitions assert.h ctype.h float.h inttypes.h limits.h math.h setjmp.h stdarg.h stddef.h stdio.h stdlib.h string.h Reference _chkdouble_ _chkfloat_ _getkey _tolower _toupper abs acos asin assert atan atan2 atof atoi atol calloc ceil cos cosh div exp fabs floor fmod free getchar gets init_mempool isalnum isalpha iscntrl isdigit isgraph islower isprint ispunct isspace isupper isxdigit labs ldiv log log10 longjmp malloc memccpy memchr memcmp memcpy memmove memset modf offsetof pow printf putchar puts rand realloc scanf setjmp sin sinh sprintf sqrt srand sscanf strcat strchr strcmp strcpy strcspn strlen strncat strncmp strncpy strpbrk strpos strrchr strrpbrk strrpos strspn strtod strtol strtoul tan tanh toascii toint tolower toupper ungetchar va_arg va_end va_start vprintf vsprintf AppendixMath Routines
| Routine | Attributes | Description |
|---|---|---|
| acos | Calculates the arc cosine of a specified number. | |
| asin | Calculates the arc sine of a specified number. | |
| atan | Calculates the arc tangent of a specified number. | |
| atan2 | Calculates the arc tangent of a fraction. | |
| ceil | Finds the integer ceiling of a specified number. | |
| cos | Calculates the cosine of a specified number. | |
| cosh | Calculates the hyperbolic cosine of a specified number. | |
| exp | Calculates the exponential function of a specified number. | |
| fabs | reentrant | Finds the absolute value of a specified number. |
| floor | Finds the largest integer less than or equal to a specified number. | |
| fmod | Calculates the floating-point remainder. | |
| log | Calculates the natural logarithm of a specified number. | |
| log10 | Calculates the common logarithm of a specified number. | |
| modf | Generates integer and fractional components of a specified number. | |
| pow | Calculates a value raised to a power. | |
| rand | reentrant | Generates a pseudo random number. |
| sin | Calculates the sine of a specified number. | |
| sinh | Calculates the hyperbolic sine of a specified number. | |
| srand | Initializes the pseudo random number generator. | |
| sqrt | Calculates the square root of a specified number. | |
| tan | Calculates the tangent of a specified number. | |
| tanh | Calculates the hyperbolic tangent of a specified number. | |
| _chkdouble_ | intrinsic, reentrant | Checks the status of a floating-point number of type double. |
| _chkfloat_ | intrinsic, reentrant | Checks the status of a floating-point number of type float>/b>. |
The math routines perform common mathematical calculations. Most of these routines work with floating-point values and include the floating-point libraries and support routines.
All of these routines are implemented as functions. Most are prototyped in the math.h include file. The rand and srand functions are prototyped in the stdlib.h include file.
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