operator== (<complex>)

测试两个复数是否相等，这两个复数或其中一个可能属于其类型与实部和虚部的类型相同的子集。

template<class T> 
   constexpr bool operator==( 
      const complex<T>& Left, 
      const complex<T>& Right 
   ); 
template<class T> 
   constexpr bool operator==( 
      const complex<T>& Left, 
      const T& Right 
   ); 
template<class T> 
   constexpr bool operator==( 
      const T& Left, 
      const complex<T>& Right 
   );

参数

• Left
  将测试其不等性的复数或与复数的参数类型相同的对象。

• Right
  将测试其不等性的复数或与复数的参数类型相同的对象。

返回值

如果数字相等，则为 true；如果数字不等，则为 false。

备注

当且仅当实部和虚部都相等时，两个复数才相等。 否则，它们不相等。

重载该操作，以便可以执行比较测试，而无需将数据转换为特定格式。

示例

// 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;
}

要求

标头：<complex>

命名空间: std