Complex numbers calculator (C++)

This is a complete complex numbers calculator that perform most of the complex numbers operations such as:

1. Add two complex numbers.
2. Substract two complex numbers.
3. Multiply two complex numbers.
4. Divide two complex numbers.
5. Conjugate of Complex number.
6. Get Angel Theta of complex number.
7. Get Moduls of complex number.
8. Converting to trigrometric form.
9. Converting to polor form.
cpp code

# include <iostream>
# include <iomanip>
# include <cmath>
# include <windows.h>
using namespace std;


int complex();

int add();

int subtract();

int multiply();

int divide();

int conjugate();

int angle_theta();

int modulus();

int convert_tri();

int convert_pol();


void clearScreen();

void setCursorPosition(short row , short col);int convert_expon();

const double pi=3.14159265358979323846264;// the constant PI

double re1,re2,im1,im2,re3,im3;//(re1,im1)first num(re2,im2)second num(re3,im3)result.

int count;// the counter of your choise (add,subtr,...).

double r1,r2; //the modulus under the root.

char choise,sign1,sign2,i1,i2;//for the question (y/n)/sign of the num +i or -i.


void main ()

{



	cout<<setw(58)<<"FACULTY OF COMPUTERS AND INFORMATION"<<endl<<endl<<endl;

	
		complex();

}

int complex()

{
	cout<<"\n"<<setw(57)<<"-C O M P L E X-N U M B E R S-\n\n"<<setw(61)<<"####\n\n\n\n";
	
	do
	
	{

number1:		
	
	cout<<"\tEnter the first complex number Z1 : ";
	
	cin>>re1>>sign1>>i1>>im1;
			
	if(sign1!='+')
			
	{
				
		if(sign1!='-')
				
		{
				
			cout << "\n\tOnly + and - are allowed.\n" << endl;
			
			goto number1;
				
		}
			
	}

			if(i1!='i')
			
		{
				cout << "\n\tOnly Letter 'i' is allowed.\n" << endl;
				
				goto number1;
		}
			


number2:		
		
		cout<<"\n\n\tEnter the second complex number Z2 : ";
				
		cin>>re2>>sign2>>i2>>im2;

		if(sign2!='+')
			
		{
			if(sign2!='-')
				
			{
					cout << "\tOnly + and - are allowed.\n" << endl;
					
					goto number2;
			}
			
		}


		if(i2!='i')
			
			
		{
				
			cout << "\tOnly Letter 'i' is allowed.\n" << endl;
				
			goto number2;
			
		}
		
		do
		
		{
menu:		
		clearScreen();
			
		cout<<endl<<setw(45)<<"\"MAIN MENU\"\n";
			
		cout<<setw(45)<<"===========\n";
			
		cout<<"\n\t1) Addition"<<setw(36)<<"2) Subtraction\n";
			
		cout<<"\n\t3) Multiplication"<<setw(27)<<"4) Division\n";
			
		cout<<"\n\t5) Conjugate"<<setw(36)<<"6) Angle(theta)\n";
			
		cout<<"\n\t7) Modulus"<<setw(57)<<"8) Transform to trigenometric form\n";
			
		cout<<"\n\t9) Transform to polar form"<<setw(40)<<"10) Transform to Exponential form\n";
			
		cout<<"\n\n\tYour choise = ";
			
			cin>>count;
			
			clearScreen();
			
			switch(count)
			
			{
			
			case 1://Addition
				
				cout<<endl<<setw(45)<<"\"Addition\"\n\n";
				
				add();
				
				break;
			
			case 2://Subtraction
				
				cout<<endl<<setw(46)<<"\"Subtraction\"\n\n";
				
				subtract();
				
				break;
			
			case 3://Multiplication
				
				cout<<endl<<setw(48)<<"\"Multiplication\"\n\n";
				
				multiply();
				
				break;
			
			case 4://Division
				
				cout<<endl<<setw(45)<<"\"Division\"\n\n";
				
				divide();
				
				break;
			
			case 5://Conjugate
				
				cout<<endl<<setw(45)<<"\"Conjugate\"\n\n";
				
				conjugate();
				
				break;
			
			case 6://Angle(theta)
				
				cout<<endl<<setw(47)<<" Angle(theta)  (\xE9) \n\n";
				
				angle_theta();
				
				break;
			
			case 7://Modulus
				
				cout<<endl<<setw(45)<<" Modulus (r) "<<"\n\n";
				
				modulus();
				
				break;
			
			case 8://Transform to trigenometric form
				
				cout<<endl<<setw(56)<<"\"Transform to trigenometric form\"\n\n";
				
				convert_tri();
				
				break;
			
			case 9://Transform to polar form
				
				cout<<endl<<setw(52)<<"\"Transform to polar form\"\n\n";
				
				convert_pol();
				
				break;
			
			case 10://Transform to Exponential form
				
				cout<<endl<<setw(55)<<"\"Transform to Exponential form\"\n\n";
				
				convert_expon();
				
				break;
			
			default :     //when the user enter anumber more than 10 .
				
				cout<<setw(46)<<"\"Out of Menu\"\n\n";
				
				cout<<"\t\tError  ! enter from 1 to 10 only \n\n";
				
				goto menu;
			
			}
			
			cout<<"\n\n\nDo you want to perform another operation on your numbrs?(y/n)";
			
			cin>>choise;   //to do another operation or not.
		
        }
		
		while(choise=='y'||choise=='Y');
		
		cout<<"\n\nDo you want to enter anew numbers?(y/n)";
		
		cin>>choise;      //to enter anew numbers or not.
		
		clearScreen();

		cout<<endl<<endl;
	}
	
	while(choise=='y'||choise=='Y');

	return (0);

}

int add()

{
    double q,p;

    if(sign1=='-'&& sign2=='-')
	
	{
		q=-1*(im1);
        
	    p=-1*(im2);
	}
	
	if(sign1=='-' && sign2=='+' )
	{
	   
		q=-1*(im1);
        
	    p=(im2);
	}

    if(sign1=='+' && sign2=='+' )
	
	{
	   
		q=(im1);
        
	    p=(im2);
	}
    
	if(sign1=='+' && sign2=='-' )
	
	{
	   
		q=(im1);
        
	    p=-1*(im2);
	}
	

	re3=re1+re2;
	
	im3=q+p;
	
	if(im3<0)
		
		cout<<"\n\tZ1 + Z2 = "<<re3<<" - i "<<im3*(-1)<<endl;
	
	else
		
		cout<<"\n\tZ1 + Z2 = "<<re3<<" + i "<<im3<<endl;
	
	return 0;
}


int subtract()

{
	double q,p;

    if(sign1=='-'&& sign2=='-')
	
	{
		q=-1*(im1);
        
	    p=-1*(im2);
	}
	
	if(sign1=='-' && sign2=='+' )
	{
	   
		q=-1*(im1);
        
	    p=(im2);
	}

    if(sign1=='+' && sign2=='+' )
	
	{
	   
		q=(im1);
        
	    p=(im2);
	}
    if(sign1=='+' && sign2=='-' )
	
	{
	   
		q=(im1);
        
	    p=-1*(im2);
	}
	
	re3=re1-re2;
	
	im3=q-p;
	
	if(im3<0)
		
		cout<<"\n\tZ1 - Z2 = "<<re3<<" - i "<<im3*(-1)<<endl;
	
	else
		
		cout<<"\n\tZ1 - Z2 = "<<re3<<" + i "<<im3<<endl;	
	
	return 0;
}

int multiply()

{
	double q,p;

    if(sign1=='-'&& sign2=='-')
	
	{
		q=-1*(im1);
        
	    p=-1*(im2);
	}
	
	if(sign1=='-' && sign2=='+' )
	{
	   
		q=-1*(im1);
        
	    p=(im2);
	}

    if(sign1=='+' && sign2=='+' )
	
	{
	   
		q=(im1);
        
	    p=(im2);
	}
    if(sign1=='+' && sign2=='-' )
	
	{
	   
		q=(im1);
        
	    p=-1*(im2);
	}

	
	re3=(re1*re2)-(q*p);
	
	im3=(re1*p)+(re2*q);
	
	if(im3<0)
		
		cout<<"\n\tZ1 * Z2 = "<<re3<<" - i "<<im3*(-1)<<endl;
	
	else
		
		cout<<"\n\tZ1 * Z2 = "<<re3<<" + i "<<im3<<endl;
	
	return 0;
}

int divide()

{
	double deno;
	
	if(sign1=='+')
	
	{
		if(sign2=='+')
		
		{
			re3=(re1*re2)+(im1*im2);
			
			im3=(-re1*im2)+(re2*im1);
		}
		
		if(sign2=='-')
		
		{
			
			re3=(re1*re2)-(im1*im2);
			
			im3=(re1*im2)+(re2*im1);
		}
	}
	
	if(sign1=='-')
	
	{
		if(sign2=='-')
		
		{
			
			re3=(re1*re2)+(im1*im2);
			
			im3=(re1*im2)-(re2*im1);
		}
		
		if(sign2=='+')
		
		{
			re3=(re1*re2)-(im1*im2);
			
			im3=(-re1*im2)+(-re2*im1);
		}
	}
	
	deno=(re2*re2)+(im2*im2);
	
	if(im3<0)
		
		cout<<"\n\tZ1 / Z2 = "<<re3<<"/"<<deno<<" - i "<<im3*(-1)<<"/"<<deno<<endl;
	else
		
		cout<<"\n\tZ1 / Z2 = "<<re3<<"/"<<deno<<" + i "<<im3<<"/"<<deno<<endl;
	
	return 0;
}


int conjugate()

{
	if(sign1=='-')
	
	{
		
		cout<<"\n\tThe conjugate of the first number = "<<re1<<" + "<<im1<<endl;
	}
	
	else
	
	{
		
		cout<<"\n\tThe conjugate of the first number = "<<re1<<" - "<<i1<<im1<<endl;
	}
	
	if(sign2=='-')
	{
		
		cout<<"\n\tThe conjugate of the first number = "<<re2<<" + "<<i2<<im2<<endl;
	}
	
	else
	
	{
	
		
		cout<<"\n\tThe conjugate of the first number = "<<re2<<" - "<<i2<<im2<<endl;
	}
		
	return 0;
}

int angle_theta()

{
	double q,p;

    if(sign1=='-'&& sign2=='-')
	
	{
		q=-1*(im1);
        
	    p=-1*(im2);
	}
	
	if(sign1=='-' && sign2=='+' )
	{
	   
		q=-1*(im1);
        
	    p=(im2);
	}

    if(sign1=='+' && sign2=='+' )
	
	{
	   
		q=(im1);
        
	    p=(im2);
	}
    if(sign1=='+' && sign2=='-' )
	
	{
	   
		q=(im1);
        
	    p=-1*(im2);
	}

	
	float g,h;
	
	cout<<"\n\tThe angle of the first number \xE9"<<"1 = ";
	
	g=atan(q/re1);
	
	g=(g*180)/pi;
	
	if(g<0)
		
		g*=-1;
	
	 if(re1>0&&q>0)
		
		g=g;
	
	 if(re1<0&&q>=0)
		
		g=180-g;
	
	 if(re1<0&&q<0)
		
		g=180+g;
	
	 if(re1>=0&&q<0)
		
		g=360-g;
	
	cout<<g<<" grade"<<endl;
	
	cout<<"\n\tThe angle of the second number \xE9"<<"2 = ";
	
	h=atan(p/re2);
	
	h=(h*180)/pi;
	
	if(h<0)
		
		h*=-1;
	
    if(re2>0&&p>0)
		
		h=h;
	
	if(re2<0&&p>=0)
		
		h=180-h;
	
    if(re2<0&&p<0)
		
		h=180+h;
	
    if(re2>=0&&p<0)
		
		h=360-h;
	
	cout<<h<<" grade"<<endl;
	
	return 0;
}


int modulus()

{
	double q,p;

    if(sign1=='-'&& sign2=='-')
	
	{
		q=-1*(im1);
        
	    p=-1*(im2);
	}
	
	if(sign1=='-' && sign2=='+' )
	{
	   
		q=-1*(im1);
        
	    p=(im2);
	}

    if(sign1=='+' && sign2=='+' )
	
	{
	   
		q=(im1);
        
	    p=(im2);
	}
    if(sign1=='+' && sign2=='-' )
	
	{
	   
		q=(im1);
        
	    p=-1*(im2);
	}

	
	cout<<"\n\tThe modulus of the first number (r1)=";
	
	r1=((re1*re1)+(q*q));
	
	cout<<" root "<<(r1)<<endl;
	
	cout<<"\n\tThe modulus of the second number (r2)=";
	
	r2=((re2*re2)+(p*p));
	
	cout<<" root "<<(r2)<<endl;
	
	return 0;
}

int convert_tri()

{
	
	float g,h;
	
	double q,p;

    if(sign1=='-'&& sign2=='-')
	
	{
		q=-1*(im1);
        
	    p=-1*(im2);
	}
	
	if(sign1=='-' && sign2=='+' )
	{
	   
		q=-1*(im1);
        
	    p=(im2);
	}

    if(sign1=='+' && sign2=='+' )
	
	{
	   
		q=(im1);
        
	    p=(im2);
	}
    if(sign1=='+' && sign2=='-' )
	
	{
	   
		q=(im1);
        
	    p=-1*(im2);
	}

	
	r1=((re1*re1)+(q*q));
	
	r2=((re2*re2)+(p*p));
	
	g=atan(q/re1);
	
	g=(g*180)/pi;
	
	if(g<0)
		
		g*=-1;
	
	if(re1>0&&q>0)
		
		g=g;
	
    if(re1<0&&q>=0)
		
		g=180-g;
	
    if(re1<0&&q<0)
		
		g=180+g;
	
	 if(re1>=0&&q<0)
		
		g=360-g;
	
	h=atan(p/re2);
	
	h=(h*180)/pi;
	
	if(h<0)
		
		h*=-1;
	
    if(re2>0&&p>0)
		
		h=h;
	
	 if(re2<0&&p>=0)
		
		h=180-h;
	
	 if(re2<0&&p<0)
		
		h=180+h;
	
	if(re2>=0&&p<0)
		
		h=360-h;
	
	cout<<"\n\tThe first number Z1 = "<<"root "<<r1<<" ( COS "<<g<<" + "<<"i"<<" SIN "<<g<<" )\n";
	
	cout<<"\n\tThe second number Z2 = "<<"root "<<r2<<" ( COS "<<h<<" + "<<"i"<<" SIN "<<h<<" )\n";
	
	return 0;
}


int convert_pol()

{
	float g,h;
	
	double q,p;

    if(sign1=='-'&& sign2=='-')
	
	{
		q=-1*(im1);
        
	    p=-1*(im2);
	}
	
	if(sign1=='-' && sign2=='+' )
	{
	   
		q=-1*(im1);
        
	    p=(im2);
	}

    if(sign1=='+' && sign2=='+' )
	
	{
	   
		q=(im1);
        
	    p=(im2);
	}
    if(sign1=='+' && sign2=='-' )
	
	{
	   
		q=(im1);
        
	    p=-1*(im2);
	}

	
	r1=((re1*re1)+(q*q));
	
	r2=((re2*re2)+(p*p));
	
	g=atan(q/re1);
	
	g=(g*180)/pi;
	
	if(g<0)
		
		g*=-1;
	
	if(re1>0&&q>0)
		
		g=g;

    if(re1<0&&q>=0)
		
		g=180-g;
	
    if(re1<0&&q<0)
		
		g=180+g;
	
	if(re1>=0&&q<0)
		
		g=360-g;
	
	h=atan(p/re2);
	
	h=(h*180)/pi;
	
	if(h<0)
		
		h*=-1;
	
	if(re2>0&&p>0)
		
		h=h;
	
	if(re2<0&&p>=0)
		
		h=180-h;
	
	if(re2<0&&p<0)
		
		h=180+h;
	
	if (re2>=0&&p<0)
		
		h=360-h;
	
	cout<<"\n\tThe first number Z1 = "<<"root "<<r1<<" ( "<<g<<endl;
	
	cout<<"\n\tThe second number Z2 = "<<"root "<<r2<<" ( "<<h<<endl;
	
	return 0;
}

int convert_expon()

{
	float g,h;

	double p,q;

    if(sign1=='-'&& sign2=='-')
	
	{
		q=-1*(im1);
        
	    p=-1*(im2);
	}
	
	if(sign1=='-' && sign2=='+' )
	{
	   
		q=-1*(im1);
        
	    p=(im2);
	}

    if(sign1=='+' && sign2=='+' )
	
	{
	   
		q=(im1);
        
	    p=(im2);
	}
    if(sign1=='+' && sign2=='-' )
	
	{
	   
		q=(im1);
        
	    p=-1*(im2);
	}

	
	r1=((re1*re1)+(q*q));
	
	r2=((re2*re2)+(p*p));
	
	g=atan(q/re1);
	
	g=(g*180)/pi;
	
	if(g<0)
		
		g*=-1;
	
	if(re1>0&&q>0)
		
		g=g;
	
    if(re1<0&&q>=0)
		
		g=180-g;
	
	if(re1<0&&q<0)
		
		g=180+g;
	
    if(re1>=0&&q<0)
		
		g=360-g;
	
	h=atan(p/re2);
	
	h=(h*180)/pi;
	
	if(h<0)
		
		h*=-1;
	
	if(re2>0&&p>0)
		
		h=h;
	
	if(re2<0&&p>=0)
		
		h=180-h;
	
	if(re2<0&&p<0)
		
		h=180+h;
	if(re2>=0&&p<0)
		h=360-h;
	
	cout<<"\n\tThe first number Z1 = "<<"root "<<r1<<" e^ i "<<g<<endl;
	
	cout<<"\n\tThe second number Z2 = "<<"root "<<r2<<" e^ i " <<h<<endl;
	
	return 0;
}

void clearScreen()

{
	HANDLE hConsole = GetStdHandle( STD_OUTPUT_HANDLE );
	
	COORD topLeft = {0,0};
	
	FillConsoleOutputCharacter(hConsole, ' ', 25*80, topLeft, NULL);
	
	setCursorPosition(0, 0);
}


void setCursorPosition(short row , short col)

{
	
	HANDLE hConsole = GetStdHandle ( STD_OUTPUT_HANDLE );
	
	COORD pos = {row, col};
	
	SetConsoleCursorPosition ( hConsole, pos );

}

Hey .. how can get this code in C++ Plz ?

Program attached

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