C++ Program of complex number

             Adding ,subtracting,multiplication, division

                                 of Complex number#include<fstream.h>

#include<iostream.h>

#include<string.h>

using namespace std;

struct complex

{

int a1,a2,b1,b2,c1,c2,d;    

};

int add(complex &ad)

{

    

ad.c1=ad.a1+ad.b1;

ad.c2=ad.a2+ad.b2;    

}

int sub(complex &ad)

{

ad.c1=ad.a1-ad.b1;

ad.c2=ad.a2-ad.b2;    

}

int mult(complex &ad)

{

ad.c1=(ad.a1*ad.b1)-(ad.a2*ad.b2);

ad.c2=(ad.a1*ad.b2)+(ad.a2*ad.b1);    

}

int div(complex ad)

{

ad.c1=(ad.a1*ad.b1)-(ad.a2*(ad.b2*-1));

ad.c2=(ad.a1*ad.b2)+(ad.a2*(ad.b1*-1));

ad.d=(ad.b1*ad.b1)+(ad.b2*ad.b2);    

if(ad.c2>=0)

cout<<                 "Your Division  is ["<<ad.c1<<"-"<<ad.c2<<"i]/"<<ad.d<<endl;

else

cout<<                   "Your Division  is ["<<ad.c1<<ad.c2<<"i]/"<<ad.d<<endl;

}

int main()

{

complex oo;

cout<<"       PRogram for [add],[subtract],[multiplition],[Divison] of Complex NUmber"<<endl<<endl;

int real,imag,choose,real1;

cout<<"                              Choose OPtion "<<endl<<endl;

cout<<"     (0) Add     (1)subtraction   (2)multipilcation     (3) Division "<<endl<<endl;

cout<<"Enter Choice plz ====";

cin>>choose;

string opp[5]={"Add","Subtraction","Mutliplicatrion","Division"};

cout<<"                  Enter 1 number  "<<endl<<endl;

cout<<"  Enter  real  part   == ";

cin>>oo.a1;

cout<<"\n";

cout<<"  Enter imagnary part == ";

cin>>oo.a2;

cout<<"                 Enter 2 number  "<<endl<<endl;

cout<<"  Enter  real  part   == ";

cin>>oo.b1;

cout<<"\n";

cout<<"  Enter imagnary part == ";

cin>>oo.b2;

if(choose<=2)

{

  if(choose==0)

  {

      add(oo);

  }

  if(choose==1)

  {

      sub(oo);

  }    

  if(choose==2)

  {

      mult(oo);

  }

  if(oo.c2>=0)

cout<<                 "Your "<<opp[choose]<<"  is ["<<oo.c1<<"+"<<oo.c2<<"i]"<<endl;

else

cout<<                   "Your "<<opp[choose]<<"  is ["<<oo.c1<<oo.c2<<"i]"<<endl;

}

if(choose==3)

  {

  div(oo);    

   }

}

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