#include <iostream>
#include <string>
using std::string;
using std::cout;

class SimpleDoubleHolder{
public:
    // 1) Constructor (with optional argument)
    
    // 2) Include the "Big Five" here
    // 2a) 
    
    // 2b) 
    
    // 2c) 
       
    // 2d) 
    
    // 2e) 
        
    void setDouble( double value);
    void printDouble();
    
private:
    double* m_DoublePtr;
};

void SimpleDoubleHolder::printDouble(){
    cout << "m_DoublePtr: ";
    if( m_DoublePtr == nullptr){
        cout << "nullptr\n";
    }else{
        cout << *m_DoublePtr << "\n";
    }
}


// setter for data member
void SimpleDoubleHolder::setDouble( double value){
    m_DoublePtr = new double( value);
}


// Constructor (with optional argument)



int main(){

    double PI = 3.14159;
    SimpleDoubleHolder original;

    original.setDouble( PI);

    cout << "original ...\n";
    original.printDouble();

    
    cout << "SimpleDoubleHolder copy( original) ...\n";
    SimpleDoubleHolder copy( original);

    cout << "original ...\n";
    original.printDouble();
    
    cout << "copy ...\n";
    copy.printDouble();


    
    SimpleDoubleHolder copyWithAssignment;
    cout << "\ncopyWithAssignment = original ...\n";
    copyWithAssignment = original;
    
    cout << "original ...\n";
    original.printDouble();
    
    cout << "copyWithAssignment ...\n";
    copyWithAssignment.printDouble();


    cout << "\nSimpleDoubleHolder another( std::move( original))...\n";
    SimpleDoubleHolder another( std::move( original));

    cout << "original ...\n";
    original.printDouble();
    
    cout << "another ...\n";
    another.printDouble();

    
    SimpleDoubleHolder yetAnother;
    cout << "\nyetAnother = std::move( copy);...\n";
    yetAnother = std::move( copy);

    cout << "copy ...\n";
    copy.printDouble();

    cout << "yetAnother ...\n";
    yetAnother.printDouble();

    return 0;
}