c++ - 从基类派生函数

Question

我可能会走错路。我被要求创建一个特定类的对象数组。但是，该类有两个派生类。

class Employee {
     // Some stuff here about the backbone of the Employee class
}

class Salary: public Employee {
     // Manipulation for Salary employee
}

class Hourly: public Employee {
     // Manipulation for hourly Employee 
}

// Main Program
int main (int argc, char**argv) {

Employee data[100]; // Creates an array of Employee objects

while (employeecount > 100 || employeecount < 1) {
    cout << "How many employees? ";
    cin >> employeecount;       
}

for(int x = 0; x <= employeecount; x++) {

    while (status != "S" || status != "s"|| status != "H" || status != "h") {
        cout << "Employee Wage Class (enter H for hourly or S for Salary)";
        cin >> status;
    }


    if (status == "S" || status == "s") { // Salaried Employee
        new 
    } else { // We valid for hourly or salary, so if its not Salaried it's an hourly

    }

}

     return 0;
}

我想问的问题是，基类可以调用派生类的方法吗？例如，如果我为名为 getgross 的 Salary 类创建了一个方法:我可以调用这样的方法吗:Employee.getgross()？如果不是，我如何调用子类方法？

Answer 1

为避免切片，您需要存储指向对象的指针

Employee* data[100];

然后您可以从各种派生类创建对象并将它们放入数组中，例如

data[0] = new Salary;

为了调用正确的方法，您需要在基类中声明一个虚拟方法，然后在您的派生类中覆盖它。