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                # C++ 函數調用運算符 () 重載 函數調用運算符 () 可以被重載用于類的對象。當重載 () 時,您不是創造了一種新的調用函數的方式,相反地,這是創建一個可以傳遞任意數目參數的運算符函數。 下面的實例演示了如何重載函數調用運算符 ()。 ``` / 所需的構造函數 Distance(){ feet = 0; inches = 0; } Distance(int f, int i){ feet = f; inches = i; } // 重載函數調用運算符 Distance operator()(int a, int b, int c) { Distance D; // 進行隨機計算 D.feet = a + c + 10; D.inches = b + c + 100 ; return D; } // 顯示距離的方法 void displayDistance() { cout << "F: " << feet << " I:" << inches << endl; } }; int main() { Distance D1(11, 10), D2; cout << "First Distance : "; D1.displayDistance(); D2 = D1(10, 10, 10); // invoke operator() cout << "Second Distance :"; D2.displayDistance(); return 0; } ``` 當上面的代碼被編譯和執行時,它會產生下列結果: ``` First Distance : F: 11 I:10 Second Distance :F: 30 I:120 ```
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