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      operator==,!=(std::complex)

      From cppreference.com
      <cpp‎ |numeric‎ |complex
       
       
       
       
      Defined in header<complex>
      (1)
      template<class T>
      bool operator==(const complex<T>& lhs,const complex<T>& rhs);
      (until C++14)
      template<class T>
      constexprbool operator==(const complex<T>& lhs,const complex<T>& rhs);
      (since C++14)
      (2)
      template<class T>
      bool operator==(const complex<T>& lhs,const T& rhs);
      (until C++14)
      template<class T>
      constexprbool operator==(const complex<T>& lhs,const T& rhs);
      (since C++14)
      (3)
      template<class T>
      bool operator==(const T& lhs,const complex<T>& rhs);
      (until C++14)
      template<class T>
      constexprbool operator==(const T& lhs,const complex<T>& rhs);
      (since C++14)
      (until C++20)
      (4)
      template<class T>
      bool operator!=(const complex<T>& lhs,const complex<T>& rhs);
      (until C++14)
      template<class T>
      constexprbool operator!=(const complex<T>& lhs,const complex<T>& rhs);
      (since C++14)
      (until C++20)
      (5)
      template<class T>
      bool operator!=(const complex<T>& lhs,const T& rhs);
      (until C++14)
      template<class T>
      constexprbool operator!=(const complex<T>& lhs,const T& rhs);
      (since C++14)
      (until C++20)
      (6)
      template<class T>
      bool operator!=(const T& lhs,const complex<T>& rhs);
      (until C++14)
      template<class T>
      constexprbool operator!=(const T& lhs,const complex<T>& rhs);
      (since C++14)
      (until C++20)

      Compares two complex numbers. Scalar arguments are treated as complex numbers with the real part equal to the argument and the imaginary part set to zero.

      1-3) Compareslhs andrhs for equality.
      4-6) Compareslhs andrhs for inequality.

      The!= operator issynthesized fromoperator==.

      (since C++20)

      [edit]Parameters

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

      [edit]Return value

      1-3)true if respective parts oflhs are equal torhs,false otherwise.
      4-6)!(lhs== rhs)

      [edit]Example

      Run this code
      #include <complex> int main(){using std::operator""i;// or: using namespace std::complex_literals;     static_assert(1.0i== 1.0i);    static_assert(2.0i!= 1.0i); constexprstd::complex z(1.0,0.0);    static_assert(z==1.0);    static_assert(1.0== z);    static_assert(2.0!= z);    static_assert(z!=2.0);}
      Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/numeric/complex/operator_cmp&oldid=150864"

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