類別 Complex

Attributes:
   double imag;
   double real;
Operations:
   Complex()                  // Simple constructor   Body:
   {
      real = imag = 0.0;
   }
   Complex(const Complex& c)  //Copy constructor   Arguments: const Complex& c
   主體:   {
      real = c.real;
      imag = c.imag;
   }
   Complex(double r, double i) // Convert constructor   Arguments:  double r
               double i = 0.0
   主體:   {
      real = r;
      imag = i;
   }

   operator-(Complex c)        // Subtraction   Return type: Complex
   Arguments: Complex c
   主體:   {
      return Complex(real - c.real, imag - c.imag);
   }
   operator[](int index)      // Array subscript   Return type: Complex&
   Arguments: int index       // dummy operator - only 
                              // for instrumentation
                              // check
   主體:   {
      return *this;
   }
   operator+(Complex& c)      // Addition by value   Return type: Complex
   
   Arguments: Complex& c
   主體:   {
      return Complex(real + c.real,imag + c.imag);
   }
   operator+(Complex* c)      // Addition by reference   Return type: Complex*
   Arguments: Complex *c
   主體:   {
      cGlobal = new Complex (real + c->real, 
         imag + c->imag);
      return cGlobal;
   }
   operator++()               // Prefix increment   Return type: Complex&
   主體:   {
      real += 1.0;
      imag += 1.0;
      return *this;
   }
   operator=(Complex& c)      // Assignment by value   Return type: Complex&
   Arguments: Complex& c
   主體:   {
      real = c.real,
      imag = c.imag;
      return *this;
   }



   operator=(Complex* c)      // Assignment by reference   Return type: Complex*
   Arguments: Complex *c
   主體:   {
      real = c->real;
      imag = c->imag;
      return this;
   }

下列是針對這些超載運算子所產生的部分程式碼範例。

這是針對超載字首增量運算子所產生的程式碼:

Complex& Complex::operator++() {
   NOTIFY_OPERATION(operator++, operator++(), 0,
      operator_SERIALIZE);
   //#[ operation operator++()
   real += 1.0;
   imag += 1.0;
   return *this;
   //#]
};

這是針對超載 + 運算子所產生的程式碼:

Complex Complex::operator+(Complex&  c) {
   NOTIFY_OPERATION(operator+, operator+(Complex&), 1,
      OM_operator_1_SERIALIZE);
   //#[ operation operator+(Complex&)
   return Complex(real + c.real, imag + c.imag);
   //#]
};

這是針對第一個超載指派運算子所產生的程式碼:

Complex& Complex::operator=(Complex&  c) {
   NOTIFY_OPERATION(operator=, operator=(Complex&), 1,
      OM_operator_2_SERIALIZE);
   //#[ operation operator=(Complex&)
   real = c.real;
   imag = c.imag;
   return *this;
//#]
};

瀏覽器列出的 MainClass 是複合的,實例化三個 Complex 類別。

其屬性如下:

Complex* c1
Complex* c2
Complex* c3
Body~MainClass()         //DestructorBody 
{
   delete c1;
   delete c2;
   delete c3;
}
e()                  // Event

串流輸出運算子 << 是個廣域函數,必須向要使用此函數的類別宣告為夥伴。其定義如下:

operator<<
Return type: ostream&
Arguments:   ostream& s
            Complex& c
主體:{
   s << "real part = " "<< c.real<< 
      "imagine part = " << c.imag << "\n" << flush;
   return s;
}

若要監看各種建構子及超載運算子被呼叫的情形:

  1. 選取程式碼 > 設定配置 > 編輯 > 設定標籤,對專案指定動畫檢測。
  2. 製作並執行 DefaultConfig.exe
  3. 使用動畫程式,建立動畫序列圖 (ASD),其中包括 MainClass 與實例 Complex[0]:ComplexComplex[1]:ComplexComplex[2]:Complex
  4. 在動畫列上按一下執行,以監看在 MainClass 與其組件實例之間傳遞的建構子及超載運算子訊息。

    動畫序列圖將與下圖相似。

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