Self-Test Exercise 18 asked you to overload the operator>> and the operator<< fo

Question

Self-Test Exercise 18 asked you to overload the operator>> and the operator<< for a class Percent. Complete and test this exercise. Implement the default constructor and the constructor with one int parameter. Overload the + and - operators to add and subtract percents. Also, overload the * operator to allow multiplication of a percent by an integer.

Write a program to test all the member functions and overloaded operators in your class definition.

SELF-TEST EXERCISE 18:

#include <iostream>

using namespace std;

class Percent

{

publc:

friend bool operator==(const Percent& first, const Percent& second);

friend bool operator<(const Percent& first, cons Percent& second);

Percent();

Percent(int percent_value);

friend istream& operator >>(istream& ins, Percent& the_object);

friend ostream& operator<<(ostream& outs, const Percent& a_percent);

private:

int value;

};

Explanation / Answer

#include <iostream>

using namespace std;

class Percent

{

public:

friend bool operator==(const Percent& first, const Percent& second);

friend bool operator<(const Percent& first, const Percent& second);

Percent();

Percent(int percent_value);

friend istream& operator >>(istream& ins, Percent& the_object);

friend ostream& operator<<(ostream& outs, const Percent& a_percent);

Percent operator+(Percent obj);

Percent operator-(Percent obj);

Percent operator*(int n);

private:

int value;

};

Percent::Percent()

{

value=0;

}

Percent::Percent(int percent_value)

{

value=percent_value;

}

istream& operator >>(istream& ins, Percent& the_object)

{

ins>>the_object.value;

return ins;

}

ostream& operator<<(ostream& outs, const Percent& a_percent)

{

outs<<a_percent.value;

return outs;

}

bool operator==(const Percent& first, const Percent& second)

{

if(first.value==second.value)

return true;

else

return false;

}

bool operator<(const Percent& first, const Percent& second)

{

if(first.value<second.value)

return true;

else

return false;

}

Percent Percent::operator +(Percent obj)

{

Percent temp=value+obj.value;

return temp;

}

Percent Percent::operator -(Percent obj)

{

Percent temp=value-obj.value;

return temp;

}

Percent Percent::operator*(int n)

{

Percent temp=value*n;

return temp;

}

int main()

{

Percent obj1;

Percent obj2;

cout<<"Enter the value for object 1 :";

cin>>obj1;

cout<<"Enter the value for object 2 :";

cin>>obj2;

cout<<"object 1: "<<obj1<<endl;

cout<<"object 2: "<<obj2<<endl;

cout<<"object 1 + object 2: "<<obj1+obj2<<endl;

cout<<"object 1 - object 2: "<<obj1-obj2<<endl;

cout<<"object 1 * 2: "<<obj1*2<<endl;

system("pause");

return 0;

}

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