Answer Posted / aalok

// Program for complex operation by using operator overloading.
#include<iostream.h>
#include<conio.h>
class complex
{
int r,i;
public:
complex()
{}
void accept();
void display();
friend complex operator +(complex ,complex );
friend complex operator -(complex ,complex );
friend complex operator *(complex ,complex );
//friend complex operator /(complex ,complex );
}; // end of class complex.

void complex::accept()
{
cout<<"\n\n Enter Real & Imaginary part of complex";
cin>>r>>i;
} //end of accept().

void complex::display()
{
cout<<r<<"+"<<i<<"i";
} //end of display().


complex operator +(complex c1,complex c2)
{
complex ans;
ans.r=c1.r+c2.r;
ans.i=c1.i+c2.i;
return(ans);
} //end of complex +()

complex operator -(complex c1,complex c2)
{
complex ans;
ans.r=c1.r-c2.r;
ans.i=c1.i-c2.i;
return(ans);
} //end of complex -()

complex operator *(complex c1,complex c2)
{
complex ans;
ans.r=(c1.r*c2.r)-(c1.i*c2.i);
ans.i=(c1.r*c2.i)+(c1.i*c2.r);
return(ans);
} //end of complex *()

/*complex operator /(complex c1,complex c2)
{
complex ans,t1,t2;

t1.r=(c1.r*c2.r)+(c1.i*c2.i);
t1.i=(c1.i*c2.r)-(c1.r*c2.i);

t2.r=(c2.r*c2.r)+(c2.i*c2.i);
t2.i=0;

ans.r=t1.r/t2.r;
ans.i=t1.i/t2.i;
return(ans);
} //end of complex /() */


void main()
{
int ch;
complex c1,c2,c3;
clrscr();
cout<<"\n Enter first complex no";
c1.accept();
c1.display();
cout<<"\n Enter second complsx no";
c2.accept();
c2.display();

cout<<"\n\n~~~~~MENU~~~~~";
cout<<"\n 1. ADDATION ";
cout<<"\n 2. SUBTRACTION ";
cout<<"\n 3. MULTIPLACTION ";
cout<<"\n 4. DIVISION ";
cout<<"\n 5. EXIT ";
cout<<"\n\n Enter your choice = \t";
cin>>ch;

switch(ch)
{
case 1:
{
c3=c1+c2;
cout<<"\n ADDATION=";
c3.display();
} // end case 1.

case 2:
{
c3=c1-c2;
cout<<"\n SUBTRACTION=";
c3.display();
} // end case 2.

case 3:
{
c3=c1*c2;
cout<<"\n MULTIPLACTION=";
c3.display();
} // end case 3.

/* case 4:
{
c3=c1/c2;
cout<<"\n DIVISION=";
c3.display();
} // end case 4. */
} //end of switch case.

getch();
} //End of main ().

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