|
Functions |
| double | exp (double x) |
| | Compute exponential function. Returns the base-e exponential function of x, which is e raised to the power x: e^x.
|
| double | frexp (double x, int *eptr) |
| | Get significand and exponent. Breaks the floating point number x into its binary significand (a floating point with an absolute value between 0.5(included) and 1.0(excluded)) and an integral exponent for 2, such that:
x = significand * 2^exponent
The exponent is stored in the location pointed by exp, and the significand is the value returned by the function.
If x is zero, both parts (significand and exponent) are zero.
If x is negative, the significand returned by this function is negative.
|
| double | ldexp (double x, int exp) |
| | Generate value from significand and exponent. Returns the result of multiplying x (the significand) by 2 raised to the power of exp (the exponent).
lexpr(x,exp) = x * 2^exp.
|
| double | log (double x) |
| | Compute natural logarithm. Returns the natural logarithm of x. The natural logarithm is the base-e logarithm: the inverse of the natural exponential function (exp). For common (base-10) logarithms, see log10.
|
| double | log10 (double x) |
| | Compute common logarithm. Returns the common (base-10) logarithm of x.
|
| double | modf (double x, double *ip) |
| | Break into fractional and integral parts. Breaks x into an integral and a fractional part. The integer part is stored in the object pointed by intpart, and the fractional part is returned by the function. Both parts have the same sign as x.
|
| double | remainder (double numer, double denom) |
| | Compute remainder. Returns the floating-point remainder of numer/denom (rounded to nearest):
remainder = numer - rquot * denom
Where rquot is the result of: numer/denom, rounded toward the nearest integral value (with halfway cases rounded toward the even number). A similar function, fmod, returns the same but with the quotient truncated (rounded towards zero) instead.
|