operator== (<complex>)

Test di uguaglianza tra due numeri complessi, uno o costituiti entrambi può appartenere al sottoinsieme dei tipi per le parti reali e immaginarie.

template<class Type> 
   bool operator==( 
      const complex<Type>& _Left, 
      const complex<Type>& _Right 
   ); 
template<class Type> 
   bool operator==( 
      const complex<Type>& _Left, 
      const Type& _Right 
   ); 
template<class Type> 
   bool operator==( 
      const Type& _Left, 
      const complex<Type>& _Right 
   );

Parametri

• _Left
  Un numero complesso o un oggetto del tipo di parametro da verificare la disuguaglianza.

• _Right
  Un numero complesso o un oggetto del tipo di parametro da verificare la disuguaglianza.

Valore restituito

true se i numeri sono uguali; false se i numeri non sono uguali.

Note

Due numeri complessi sono uguali se e solo se le parti reali sono uguali e le relative parti immaginarie sono uguali. In caso contrario, sono diversi.

L'operazione è in overload in modo da poter eseguire test di confronto senza la conversione dei dati in un formato particolare.

Esempio

// complex_op_EQ.cpp
// compile with: /EHsc
#include <complex>
#include <iostream>

int main( )
{
   using namespace std;
   double pi = 3.14159265359;

   // Example of the first member function
   // type complex<double> compared with type complex<double>
   complex <double> cl1 ( polar ( 3.0 , pi / 6 ) );
   complex <double> cr1a ( polar ( 3.0 , pi /6 ) );
   complex <double> cr1b ( polar ( 2.0 , pi / 3 ) );

   cout << "The left-side complex number is cl1 = " << cl1 << endl;
   cout << "The 1st right-side complex number is cr1a = " << cr1a << endl;
   cout << "The 2nd right-side complex number is cr1b = " << cr1b << endl;
   if ( cl1 == cr1a )
      cout << "The complex numbers cl1 & cr1a are equal." << endl;
   else
      cout << "The complex numbers cl1 & cr1a are not equal." << endl;
   if ( cl1 == cr1b )
      cout << "The complex numbers cl1 & cr1b are equal." << endl;
   else
      cout << "The complex numbers cl1 & cr1b are not equal." << endl;
   cout << endl;

   // Example of the second member function
   // type complex<int> compared with type int
   complex <int> cl2a ( 3 , 4 );
   complex <int> cl2b ( 5 ,0 );
   int cr2a =3;
   int cr2b =5;

   cout << "The 1st left-side complex number is cl2a = " << cl2a << endl;
   cout << "The 1st right-side complex number is cr2a = " << cr2a << endl;
   if ( cl2a == cr2a )
      cout << "The complex numbers cl2a & cr2a are equal." << endl;
   else
      cout << "The complex numbers cl2a & cr2a are not equal." << endl;

   cout << "The 2nd left-side complex number is cl2b = " << cl2b << endl;
   cout << "The 2nd right-side complex number is cr2b = " << cr2b << endl;
   if ( cl2b == cr2b )
      cout << "The complex numbers cl2b & cr2b are equal." << endl;
   else
      cout << "The complex numbers cl2b & cr2b are not equal." << endl;
   cout << endl;

   // Example of the third member function
   // type double compared with type complex<double>
   double cl3a =3;
   double cl3b =5;
   complex <double> cr3a (3 , 4 );
   complex <double> cr3b (5 ,0 );

   cout << "The 1st left-side complex number is cl3a = " << cl3a << endl;
   cout << "The 1st right-side complex number is cr3a = " << cr3a << endl;
   if ( cl3a == cr3a )
      cout << "The complex numbers cl3a & cr3a are equal." << endl;
   else
      cout << "The complex numbers cl3a & cr3a are not equal." << endl;

   cout << "The 2nd left-side complex number is cl3b = " << cl3b << endl;
   cout << "The 2nd right-side complex number is cr3b = " << cr3b << endl;
   if ( cl3b == cr3b )
      cout << "The complex numbers cl3b & cr3b are equal." << endl;
   else
      cout << "The complex numbers cl3b & cr3b are not equal." << endl;
   cout << endl;
}

Requisiti

complesso <diIntestazione: >

Spazio dei nomi: std