Note: 1) you must use multi-file approach to the program and 2) pre- and post-co

Question

Note: 1) you must use multi-file approach to the program and 2) pre- and post-conditions are intentionally left incomplete and you are asked to fill in wherever applicable (refer to P6).

in Devc++

P8.1       Given the rational class interface below:

class rational {

public:

   rational();

   rational(int, int);

   rational add(const rational &) const;

   rational subtract(const rational &) const;

   rational multiply(const rational &) const;

   rational divide(const rational &) const;

   bool lessThan(const rational &);

   // Postcondition: returns true if calling object is smaller; returns false otherwise

          void display();

   // Postcondition: calling object is displayed as: 1/4 (not 2/8), -2/3 (not 2/-3), 0 (not 0/5), etc.

   void input();

          // displays prompt message "Enter values for numerator and denominator: "

   // Postcondition: two values entered are read and stored in num and denom of the calling obj

private:

   int GCD();

   // Postcondition: returns the greatest common divisor between num and denom

   int num;

   int denom;

};

Implement two friend functions.

Implement all eight member functions.

Write a main() function to test all member functions.

Your program output should be similar to the following sample display. Notice that r2 is initialized by the second constructor to a value of 1/3 (i.e., 0) and r1 is declared with no parameter thus it is initialized to 0/1 by calling the default constructor. Your program output should be similar to the following sample display (except 0/1 should be displayed as 0)

1 is initialized by default constructor r1 0/1 r2 is initialized by the 2nd constructor: r2 1/3 Calling overloaded operator to reset r1 Enter values for numerator followed by denominator: 25 After reset r1 2/5 esting overloade arithmetic and insertion operator

Explanation / Answer

#include <iostream>
using namespace std;
class Test
{
public:
int main(int s){
cout << s << " ";
return 0;
}
int main(char *s) {
cout << s << endl;
return 0;
}
int main(int s ,int m)
{
cout << s << " " << m;
return 0;
}
};
int main()
{
Test obj;
obj.main(2);
obj.main("I love java");
obj.main(2, 4);
return 0;
}

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