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std::complex::operator+(binary), operator-(binary), operator*, operator/

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< cpp‎ | numeric‎ | complex
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template< class T >
complex<T> operator+( const complex<T>& lhs, const complex<T>& rhs);
</td>

<td > (1) </td> <td class="t-dcl-nopad"> </td> </tr> <tr class="t-dcl-sep"><td></td><td></td><td></td></tr>

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<td >
template< class T >
complex<T> operator+( const complex<T>& lhs, const T& rhs);
</td>

<td > (2) </td> <td class="t-dcl-nopad"> </td> </tr> <tr class="t-dcl-sep"><td></td><td></td><td></td></tr>

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<td >
template< class T >
complex<T> operator+( const T& lhs, const complex<T>& rhs);
</td>

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<td >
template< class T >
complex<T> operator-( const complex<T>& lhs, const complex<T>& rhs);
</td>

<td > (4) </td> <td class="t-dcl-nopad"> </td> </tr> <tr class="t-dcl-sep"><td></td><td></td><td></td></tr>

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<td >
template< class T >
complex<T> operator-( const complex<T>& lhs, const T& rhs);
</td>

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<td >
template< class T >
complex<T> operator-( const T& lhs, const complex<T>& rhs);
</td>

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<td >
template< class T >
complex<T> operator*( const complex<T>& lhs, const complex<T>& rhs);
</td>

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<td >
template< class T >
complex<T> operator*( const complex<T>& lhs, const T& rhs);
</td>

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<td >
template< class T >
complex<T> operator*( const T& lhs, const complex<T>& rhs);
</td>

<td > (9) </td> <td class="t-dcl-nopad"> </td> </tr> <tr class="t-dcl-sep"><td></td><td></td><td></td></tr>

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<td >
template< class T >
complex<T> operator/( const complex<T>& lhs, const complex<T>& rhs);
</td>

<td > (10) </td> <td class="t-dcl-nopad"> </td> </tr> <tr class="t-dcl-sep"><td></td><td></td><td></td></tr>

<tr class="t-dcl ">

<td >
template< class T >
complex<T> operator/( const complex<T>& lhs, const T& rhs);
</td>

<td > (11) </td> <td class="t-dcl-nopad"> </td> </tr> <tr class="t-dcl-sep"><td></td><td></td><td></td></tr>

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<td >
template< class T >
complex<T> operator/( const T& lhs, const complex<T>& rhs);
</td>

<td > (12) </td> <td class="t-dcl-nopad"> </td> </tr> Template:ddcl list end

Implements the binary operators for complex arithmetic and for mixed complex/scalar arithmetic. Scalar arguments are treated as complex numbers with the real part equal to the argument and the imaginary part set to zero.

1-3) Returns the sum of its arguments
4-6) Returns the result of subtracting rhs from lhs
7-9) Multiplies its arguments
10-12) Divides lhs by rhs

Contents

Parameters

lhs, rhs - the arguments: either both complex numbers or one complex and one scalar of matching type (float, double, long double)

Return value

1-3) complex<T>(lhs) += rhs
4-6) complex<T>(lhs) -= rhs
7-9) complex<T>(lhs) *= rhs
10-12) complex<T>(lhs) /= rhs

Example

#include <iostream>
#include <complex>
int main()
{
    std::complex<double> c2(2, 0);
    std::complex<double> ci(0, 1);
 
    std::cout << ci << " + " << c2 << " = " << ci+c2 << '\n'
              << ci << " * " << ci << " = " << ci*ci << '\n'
              << ci << " + " << c2 << " / " << ci << " = " << ci+c2/ci << '\n'
              << 1  << " / " << ci << " = " << 1./ci << '\n';
 
//    std::cout << 1.f/ci; // compile error
//    std::cout << 1/ci; // compile error
}

Output:

(0,1) + (2,0) = (2,1)
(0,1) * (0,1) = (-1,0)
(0,1) + (2,0) / (0,1) = (0,-1)
1 / (0,1) = (0,-1)

See also

Template:cpp/numeric/complex/dcl list operator arithTemplate:cpp/numeric/complex/dcl list operator arith2