Create friend square() function for Measure class - C++ Class

C++ examples for Class:friend

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Description

Create friend square() function for Measure class

Demo Code

#include <iostream>
using namespace std;
class Measure/*from www  . j  a v  a  2 s  .  c o m*/
{
   private:
   int feet;
   float inches;
   public:
   Measure()
   { feet = 0; inches = 0.0; }
   Measure(float fltfeet)     //constructor (one arg)
   {                        //feet is integer part
   feet = static_cast<int>(fltfeet);
   inches = 12*(fltfeet-feet);  //inches is what's left
}
Measure(int ft, float in) : feet(ft), inches(in)
{  }
void showdist()
{ cout << feet << "\'-" << inches << '\"'; }
friend Measure operator * (Measure, Measure); //friend
};
//multiply d1 by d2
Measure operator * (Measure d1, Measure d2)
{
    float fltfeet1 = d1.feet + d1.inches/12;  //convert to float
    float fltfeet2 = d2.feet + d2.inches/12;
    float multfeet = fltfeet1 * fltfeet2;     //find the product
    return Measure(multfeet);     //return temp Measure
}
int main()
{
    Measure dist1(3, 6.0);        //make some distances
    Measure dist2(2, 3.0);
    Measure dist3;
    dist3 = dist1 * dist2;         //multiplication
    dist3 = 10.0 * dist3;          //mult and conversion
    //display all distances
    cout << "\ndist1 = "; dist1.showdist();
    cout << "\ndist2 = "; dist2.showdist();
    cout << "\ndist3 = "; dist3.showdist();
    cout << endl;
    return 0;
}

Result


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