constobj.cpp

来自「本课程主要介绍面向对象程序设计的方法和c++语言的基本概念。以c++语言中的面向」· C++ 代码 · 共 33 行

// constObj.cpp
// constant Distance objects
#include <iostream>
using namespace std;
////////////////////////////////////////////////////////////////
class Distance                    //English Distance class
   {
   private:
      int feet;
      float inches;
   public:                        //2-arg constructor
      Distance(int ft, float in) : feet(ft), inches(in)
         {  }
      void getdist()              //user input; non-const func
         {
         cout << "\nEnter feet: ";  cin >> feet;
         cout << "Enter inches: ";  cin >> inches;
         }
      void showdist() const       //display distance; const func
         { cout << feet << "\'-" << inches << '\"'; }
   };
////////////////////////////////////////////////////////////////
int main()
   {
   const Distance football(300, 0);

// football.getdist();            //error: getdist() not const
   cout << "football = ";
   football.showdist();           //OK
   cout << endl;
   return 0;
   }