C++ Class Member Function Create member square() function for Measure

#include <iostream>
using namespace std;
class Measure/*from w  w  w  .j a  v a2s  . c om*/
{
   private:
   int feet;
   float inches;
   public:
   Measure() : feet(0), inches(0.0)
   {  }
   Measure(int ft, float in) : feet(ft), inches(in)
   {  }
   void showdist()
   { cout << feet << "\'-" << inches << '\"'; }
   float square();             //member function
};
float Measure::square()          //return square of
{                              //this Measure
    float fltfeet = feet + inches/12;    //convert to float
    float feetsqrd = fltfeet * fltfeet;  //find the square
    return feetsqrd;               //return square feet
}
int main()
{
    Measure dist(3, 6.0);         //two-arg constructor (3'-6")
    float sqft;
    sqft = dist.square();          //return square of dist
    and square
    cout << "\nMeasure = "; dist.showdist();
    cout << "\nSquare = " << sqft << " square feet\n";
    return 0;
}