多态案例：计算机类 C++ VS code 乌班图

#include 
using namespace std;

//实现计算器抽象类
class AbstractCalculator
{

public:
    // virtual int getResult()//虚函数
    // {
    //     return 0;
    // }
    virtual int getResult()=0;//纯虚函数
    int m_Num1;
    int m_Num2;
};

//加法计算器类
class AddCalculator : public AbstractCalculator
{
public:
    int getResult()
    {
        return m_Num1 + m_Num2;
    }
};

//减法计算器类
class SubCalculator : public AbstractCalculator
{
public:
    int getResult()
    {
        return m_Num1 - m_Num2;
    }
};

//乘法计算器类
class MulCalculator : public AbstractCalculator
{
public:
    int getResult()
    {
        return m_Num1 * m_Num2;
    }
};

void test()
{
    //父类的指针或引用指向子类的对象
    AbstractCalculator *abc = new AddCalculator; //堆区，
    abc->m_Num1 = 60;
    abc->m_Num2 = 20;
    cout << abc->m_Num1 << "+" << abc->m_Num2 << "=" << abc->getResult() << endl;
    //销毁
    delete abc;

    abc = new SubCalculator;
    abc->m_Num1 = 60;
    abc->m_Num2 = 20;
    cout << abc->m_Num1 << "-" << abc->m_Num2 << "=" << abc->getResult() << endl;
    delete abc;

    abc = new MulCalculator;
    abc->m_Num1 = 60;
    abc->m_Num2 = 20;
    cout << abc->m_Num1 << "*" << abc->m_Num2 << "=" << abc->getResult() << endl;
    delete abc;
}
int main()
{

    test();
    return 0;
}