#include <iostream>

using namespace std;

class PrintData {
public:
    void print(int i) {
        cout << "int i is :" << i << endl;
    }

    void print(float i) {
        cout << "float i is :" << i << endl;
    }

    void print(double i) {
        cout << "double i is :" << i << endl;
    }

    void print(int *i) {
        cout << "ptr i is :" << *i << endl;
    }
};

int main() {
    PrintData print_line = PrintData();
    print_line.print(1);
    print_line.print(float (1.));
    print_line.print(1.1245666666666666666666);
    int i = 1;
    print_line.print(&i);
    return 0;
}

#include <iostream>

using namespace std;

class Box{
private:
    double length;
    double breadth;
    double height;
public:
    double getVolume()
    {
        return length*breadth*height;
    }
    void setLength(double length){
        this->length = length;
    }
    void setBreadth(double breadth){
        this->breadth = breadth;
    }
    void setHeight(double height){
        this->height = height;
    }
    Box operator+(const Box&b){
        Box box;
        box.length = this->length+b.length;
        box.breadth = this->breadth+b.breadth;
        box.height = this->height+b.height;
        return box;
    }
};

int main() {
    Box Box1;
    Box Box2;
    Box Box3;

    double volume;

    Box1.setLength(6.0);
    Box1.setBreadth(7.0);
    Box1.setHeight(8.0);



    Box2.setLength(12.0);
    Box2.setBreadth(13.0);
    Box2.setHeight(10.0);

    volume= Box1.getVolume();
    cout<<"Volume of Box1:"<<volume<<endl;
    // box2 的体积
    volume = Box2.getVolume();
    cout<<"Volume of Box2:"<<volume<<endl;

    Box3 = Box1+Box2;
    volume = Box3.getVolume();
    cout<<"Volume of Box3:"<<volume<<endl;
    return 0;


}