englret.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 57 行

// englret.cpp
// function returns value of type Distance
#include <iostream>
using namespace std;
////////////////////////////////////////////////////////////////
class Distance                        //English Distance class
   {
   private:
      int feet;
      float inches;
   public:                            //constructor (no args)
      Distance() : feet(0), inches(0.0)                      
         {  }                         //constructor (two args)
      Distance(int ft, float in) : feet(ft), inches(in)      
         {  }

      void getdist()                  //get length from user
         {
         cout << "\nEnter feet: ";  cin >> feet;
         cout << "Enter inches: ";  cin >> inches;
         }
      void showdist()                 //display distance
         { cout << feet << "\'-" << inches << '\"'; }

      Distance add_dist(Distance);    //add 
   };
//--------------------------------------------------------------
//add this distance to d2, return the sum
Distance Distance::add_dist(Distance d2) 
   {
   Distance temp;                     //temporary variable
   temp.inches = inches + d2.inches;  //add the inches
   if(temp.inches >= 12.0)            //if total exceeds 12.0,
      {                               //then decrease inches
      temp.inches -= 12.0;            //by 12.0 and
      temp.feet = 1;                  //increase feet
      }                               //by 1
   temp.feet += feet + d2.feet;       //add the feet
   return temp;
   }
////////////////////////////////////////////////////////////////
int main()
   {
   Distance dist1, dist3;          //define two lengths
   Distance dist2(11, 6.25);       //define, initialize dist2

   dist1.getdist();                //get dist1 from user
   dist3 = dist1.add_dist(dist2);  //dist3 = dist1 + dist2

                                   //display all lengths
   cout << "\ndist1 = ";  dist1.showdist();
   cout << "\ndist2 = ";  dist2.showdist();
   cout << "\ndist3 = ";  dist3.showdist();
   cout << endl;
   return 0;
   }