Complex Number Class

Complex Number Class
A complex number is a number that has two components; the real component and the imaginary component.


a + bi

Arithmetic is defined as follows:

(a + bi) + (c + di) = (a + c) + (b + d)i

(a + bi) - (c + di) = (a - c) + (b - d)i

(a + bi) * (c + di) = (ac - bd) + (ad + bc)i

(a + bi) / (c + di) = (ac + bd) / (c**2+d**2) + [ (bc -ad) /(c**2+d**2)]i

Class Declaration

class complex


{

public:

complex();

complex(double,double);

double getReal() const;

void setReal(double);

complex operator+(complex) const;

complex operator-(complex) const;

complex operator*(complex) const;

complex operator/(complex) const;

private:

double real, imag;

};

complex::complex():real(0),y(0)


{ //default constructor

}



complex :: complex(double r, double im)

{

real = r;

imag = im;

}

complex complex::operator+(complex c) const


{

complex temp;

temp.real = real + c.real;

temp.imag = imag + c.imag;

return temp;

}

complex complex::operator/(complex c) const


{

complex temp;

temp.real = (real*c.real + imag*c.imag)/

( pow(c.real,2) + pow(imag,2) );

temp.imag = (imag*c.real - real*c.imag)/

( pow(c.real,2) + pow(imag,2) );

return temp;

}

complex complex::operator*(complex c) const


{

complex temp;

temp.real = real*c.real – imag*c.imag;

temp.imag = real*c.imag + imag*c.real;

return temp;

}

Scan line poly fill

#include


#include

#include



main()

{



int n,i,j,k,gd,gm,dy,dx;

int x,y,temp;

int a[20][2],xi[20];

float slope[20];





clrscr();

printf("\n\n\tEnter the no. of edges of polygon : ");

scanf("%d",&n);

printf("\n\n\tEnter the cordinates of polygon :\n\n\n ");



for(i=0;i

{

printf("\tX%d Y%d : ",i,i);

scanf("%d %d",&a[i][0],&a[i][1]);

}



a[n][0]=a[0][0]; // polygon

a[n][1]=a[0][1];





detectgraph(&gd,&gm);

initgraph(&gd,&gm,"c:\\bgi");





/*- draw polygon -*/



for(i=0;i

{

line(a[i][0],a[i][1],a[i+1][0],a[i+1][1]);

}



getch();





for(i=0;i

{

dy=a[i+1][1]-a[i][1];

dx=a[i+1][0]-a[i][0];



if(dy==0) slope[i]=1.0;

if(dx==0) slope[i]=0.0;



if((dy!=0)&&(dx!=0)) /*- calculate inverse slope -*/

{

slope[i]=(float) dx/dy;

}

}



for(y=0;y< 480;y++) // find x intersections

{

k =0;

for(i=0;i

{

if( ((a[i][1]<=y)&&(a[i+1][1]>y))

((a[i][1]>y)&&(a[i+1][1]<=y)))

{

xi[k]=(int)(a[i][0]+slope[i]*(y-a[i][1]));

k++;

}

}



for(j=0;j

for(i=0;i

{

if(xi[i]>xi[i+1])

{

temp=xi[i];

xi[i]=xi[i+1];

xi[i+1]=temp;

}

}



setcolor(35);

for(i=0;i

{

line(xi[i],y,xi[i+1]+1,y);

getch();

}



}

return 0;

}

FTP access

Who deleted SECOMP folder from ftp?

This is very serious!!!

Definately some one from your class....