# 如何通過 C++ 中的函數傳遞和返回對象？ > 原文： [https://www.programiz.com/cpp-programming/pass-return-object-function](https://www.programiz.com/cpp-programming/pass-return-object-function) #### 在本文中，您將學習在 C++ 編程中將對象傳遞給函數并從函數返回對象。 在 C++ 編程中，[對象可以與結構](/cpp-programming/structure-function)相似的方式傳遞給函數。 * * * ## 如何將對象傳遞給函數？  * * * ## 示例 1：將對象傳遞給函數 **C++ 程序，通過將對象傳遞給函數來加兩個復數。** ```cpp #include <iostream> using namespace std; class Complex { private: int real; int imag; public: Complex(): real(0), imag(0) { } void readData() { cout << "Enter real and imaginary number respectively:"<<endl; cin >> real >> imag; } void addComplexNumbers(Complex comp1, Complex comp2) { // real represents the real data of object c3 because this function is called using code c3.add(c1,c2); real=comp1.real+comp2.real; // imag represents the imag data of object c3 because this function is called using code c3.add(c1,c2); imag=comp1.imag+comp2.imag; } void displaySum() { cout << "Sum = " << real<< "+" << imag << "i"; } }; int main() { Complex c1,c2,c3; c1.readData(); c2.readData(); c3.addComplexNumbers(c1, c2); c3.displaySum(); return 0; } ``` **輸出** ```cpp Enter real and imaginary number respectively: 2 4 Enter real and imaginary number respectively: -3 4 Sum = -1+8i ``` * * * ## 如何從函數返回對象？ 在 C++ 編程中，可以通過與結構類似的方式從函數中返回[對象](/cpp-programming/structure-function)。  * * * ## 示例 2：從函數傳遞和返回對象 在該程序中，復數（對象）的總和返回到`main()`函數并顯示。 ```cpp #include <iostream> using namespace std; class Complex { private: int real; int imag; public: Complex(): real(0), imag(0) { } void readData() { cout << "Enter real and imaginary number respectively:"<<endl; cin >> real >> imag; } Complex addComplexNumbers(Complex comp2) { Complex temp; // real represents the real data of object c3 because this function is called using code c3.add(c1,c2); temp.real = real+comp2.real; // imag represents the imag data of object c3 because this function is called using code c3.add(c1,c2); temp.imag = imag+comp2.imag; return temp; } void displayData() { cout << "Sum = " << real << "+" << imag << "i"; } }; int main() { Complex c1, c2, c3; c1.readData(); c2.readData(); c3 = c1.addComplexNumbers(c2); c3.displayData(); return 0; } ```