multiple inheritance with English Distances : multiple base classes « Class « C++ Tutorial

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C++ Tutorial » Class » multiple base classes 
9.19.3.multiple inheritance with English Distances
#include <iostream>  
  #include <string>  
  using namespace std;  

  class Type{  
     private:  
        string dimensions;  
        string grade;  
     public:                        
        Type() : dimensions("N/A"), grade("N/A"){  }  
                                    
        Type(string di, string gr: dimensions(di), grade(gr)  
        {  }  
        void gettype(){  
           cout << "   Enter nominal dimensions (2x4 etc.): ";  
           cin >> dimensions;  
           cout << "   Enter grade (rough, const, etc.): ";  
           cin >> grade;  
        }  
        void showtype() const       
        {  
           cout << "\n   Dimensions: " << dimensions;  
           cout << "\n   Grade: " << grade;  
        }  
  };
  class Distance{  
     private:  
        int feet;  
        float inches;  
     public:    
        Distance() : feet(0), inches(0.0){  } 
        Distance(int ft, float in: feet(ft), inches(in)  
          {  }  
        void getdist(){  
           cout << "   Enter feet: ";  cin >> feet;  
           cout << "   Enter inches: ";  cin >> inches;  
        }  
        void showdist() const       
        cout  << feet << "\'-" << inches << '\"'}  
  };
  class Lumber : public Type, public Distance  {  
     private:  
        int quantity;                      
        double price;                      
     public:                               
        Lumber() : Type(), Distance(), quantity(0), price(0.0)  
        {  }  
        Lumberstring di, string gr,      
                int ft, float in,          
                int qu, float prc :      
                Type(di, gr),              
                Distance(ft, in),          
                quantity(qu), price(prc)   
        {  }  
        void getlumber()  
        {  
           Type::gettype();  
           Distance::getdist();  
           cout << "   Enter quantity: "; cin >> quantity;  
           cout << "   Enter price per piece: "; cin >> price;  
        }  
        void showlumber() const  
        {  
           Type::showtype();  
           cout << "\n   Length: ";  
           Distance::showdist();  
           cout << "\n   Price for " << quantity  
               << " pieces: $" << price * quantity;  
        }  
  };  
  int main(){  
     Lumber siding;                   
     siding.getlumber();              
     Lumber studs"2x4""const"80.02004.45F );  
    
     cout << "\nSiding";  siding.showlumber();  
     cout << "\nStuds";     studs.showlumber();  
     cout << endl;  
     return 0;  
    }
9.19.multiple base classes
9.19.1.An example of multiple base classes.
9.19.2.multiple inheritance with employees and degrees
9.19.3.multiple inheritance with English Distances
9.19.4.Multiple Inheritance to have the features from both parent
9.19.5.Resolving Ambiguity in Case of Multiple Inheritance Involving Common Base Classes
9.19.6.Multiple Inheritance in both private and public way
9.19.7.In cases of multiple inheritance: Constructors are called in order of derivation, destructors in reverse order
9.19.8.Multiple inheritance example
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