How do you write a program to demonstrate boolean operators in C plus plus?

Answer 1

#include

#include

class A

{

public:

A(std::string desc,double price):m_desc(desc),m_price(price){}

A(const A& rhs):m_desc(rhs.m_desc),m_price(rhs.m_price){}

A& operator= (const A& rhs){ m_desc=rhs.m_desc; m_price=rhs.m_price; }

const bool operator== (const A& rhs) const { return(m_desc==rhs.m_desc && m_price==rhs.m_price);}

const bool operator!= (const A& rhs) const { return(m_desc!=rhs.m_desc && m_price!=rhs.m_price);}

static void compare(const A& a, const A& b);

friend std::ostream& operator<< (std::ostream& os, const A& rhs);

private:

double m_price;

std::string m_desc;

};

std::ostream& operator<< (std::ostream& os, const A& rhs)

{

os<

return(os);

}

void A::compare(const A& a, const A& b)

{

if ( a==b )

std::cout<

// else if ( a!=b )

std::cout<

}

int main()

{

A a("Knife", 1.89);

A b("Fork", 1.99);

A c("Fork", 2.99);

A d(a);

std::cout<<"Objects:\n"<

std::cout<

std::cout<

std::cout<

std::cout<

std::cout<<"\nBoolean operator results:\n"<

A::compare(a,b);

A::compare(a,c);

A::compare(a,d);

A::compare(b,c);

A::compare(b,d);

A::compare(c,d);

}

Output

Objects:

Knife ($1.89)

Fork ($1.99)

Fork ($2.99)

Knife ($1.89)

Boolean operator results:

Knife ($1.89) is not the same as Fork ($1.99)

Knife ($1.89) is not the same as Fork ($2.99)

Knife ($1.89) is the same as Knife ($1.89)

Knife ($1.89) is not the same as Knife ($1.89)

Fork ($1.99) is not the same as Fork ($2.99)

Fork ($1.99) is not the same as Knife ($1.89)

Fork ($2.99) is not the same as Knife ($1.89)