Cmath
lastmod 2020-08-25created 2015-09-0110 edits
Functions
-
ceil() - Rounds up everything after the decimal point.
-
roundf() - Rounds the fractional part to the nearest integer
-
floor() - Discards everything after the decimal point
-
modf() - Gets the integer part and the fractional part.
logarithm
-
log - https://github.com/lattera/glibc/blob/master/sysdeps/ieee754/dbl-64/e_log.c
- Computes the logarithm.
-
log10 - https://github.com/lattera/glibc/blob/master/sysdeps/ieee754/dbl-64/e_log10.c
- Computes the base-10 logarithm. (Common logarithm)
abs
Functions that compute the absolute value. abs() and labs() return the absolute value of an integer, and fabs() returns the absolute value of a real number.
| function | parameter |
| abs | int |
| labs | long |
| llabs | long long |
| fabsf | float |
| fabs | double |
| fabsl | long double |
atan2
In a variety of computer languages, the two-argument function atan2 is a variation of the arctangent function.
- Compute arc tangent with two parameters.
- Returns the principal value of the arc tangent of y/x, expressed in radians.
- To compute the value, the function uses the sign of both arguments to determine the quadrant.