<complex>
template<class T> T abs (const complex<T>& x);
Return absolute value of complex
Returns the absolute value of the complex number x.
The absolute value of a complex number is its magnitude (or modulus), defined as the theoretical distance between the coordinates (real,imag) of x and (0,0) (apply pythagorean theorem).
This function overloads cstdlib's abs and cmath's abs functions.
Parameters
- x
- Complex value.
Return value
Absolute value of x.
T is x's complex template type (i.e., its value type).
Example
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// abs complex example
#include <iostream>
#include <complex>
using namespace std;
int main ()
{
complex<double> mycomplex (3.0,4.0);
cout << "The absolute value of " << mycomplex << " is " << abs(mycomplex) << endl;
return 0;
}
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Output:
The absolute value of (3,4) is 5
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See also
| arg | Return phase angle of complex (function template) |
| polar | Return complex from polar components (function tempalte) |
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