C++ CPU 类设计与实现：构造函数、析构函数、拷贝构造函数

C++ CPU 类设计与实现

**1. CPU 类声明：**c++enum CPU_Rank { P1 = 1, P2, P3, P4, P5, P6, P7 };

class CPU {private: CPU_Rank rank; int frequency; float voltage;

public: void run(); void stop(); void setCPU(CPU_Rank r, int f, float v);};

void CPU::run() { cout << 'CPU 开始运行！' << endl;}

void CPU::stop() { cout << 'CPU 停止运行！' << endl;}

void CPU::setCPU(CPU_Rank r, int f, float v) { rank = r; frequency = f; voltage = v;}

**2. 创建 CPU 对象并设置属性：**c++CPU cpu;cpu.setCPU(P4, 2000, 1.8);

**3. 使用构造函数代替 setCPU 函数：**c++class CPU {private: CPU_Rank rank; int frequency; float voltage;

public: CPU(CPU_Rank r, int f, float v); void run(); void stop();};

CPU::CPU(CPU_Rank r, int f, float v) { rank = r; frequency = f; voltage = v;}

CPU cpu(P6, 3000, 1.8);

**4. 重载构造函数：**c++class CPU {private: CPU_Rank rank; int frequency; float voltage;

public: CPU(); CPU(CPU_Rank r, int f, float v); void run(); void stop();};

CPU::CPU() { rank = P6; frequency = 3000; voltage = 220;}

CPU cpu;

**5. 定义析构函数：**c++class CPU {private: CPU_Rank rank; int frequency; float voltage;

public: CPU(); CPU(CPU_Rank r, int f, float v); ~CPU(); void run(); void stop();};

CPU::~CPU() { cout << 'Good bye!' << endl;}

**6. 定义拷贝构造函数：**c++class CPU {private: CPU_Rank rank; int frequency; float voltage;

public: CPU(); CPU(CPU_Rank r, int f, float v); CPU(const CPU& c); ~CPU(); void run(); void stop();};

CPU::CPU(const CPU& c) { rank = c.rank; frequency = c.frequency; voltage = c.voltage;}

**7. 主函数：**c++int main() { CPU cpu1; CPU cpu2(P4, 2000, 1.8); CPU cpu3(cpu2);

cpu1.run();    cpu2.stop();    cpu3.run();

return 0