//QuadEqn.java
package p;
interface Quadratic
{
void process();
}
public class QuadEqn implements Quadratic
{
double a,b,c,d;
public QuadEqn(double x,double y,double z)
{
a=x;
b=y;
c=z;
}
public void process()
{

d=b*b-(4*a*c);
if(d==0)
{
double r=-b/2*a;
System.out.println(Roots are equal.Root=\t+r);
}
else
if(d>0)
{
double sq=Math.sqrt(d);
double r1=(-b+sq)/2*a;
double r2=(-b-sq)/2*a;
System.out.println(Root1=\t+r1+\nRoot2=\t+r2);
}
else
System.out.pri ....etc

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import java.io.*;
class Factorial
{
int fact(int n)
{
if(n<=1)
return 1;
else
return (n*fact(n-1));
}
}
class Newfact
{
public static void main(String args)throws IOException
{
DataInputStream dis=new DataInputStream(System.in);
System.out.println(Enter the number);
int i=Integer.parseInt(dis.readLine());
Factorial f=new Factorial();
System.out.println(Factorial is+f.fact(i));
}
}



OUTPUT

E:\ 5BCA-B\lijo\java >javac Newfact.java
Note: Newfact.ja ....etc

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import java.io.*;
class Figure
{
double x,y;
Figure(double l, double m)
{
x=l;
y=m;
}
}
class Rectangle extends Figure
{
Rectangle(double l, double m)
{
super(l,m);
}
double area()
{
return(x*y);
}
}
class Circle extends Figure
{
final float pi=3.14f;
Circle(double l,double m)
{
super(l,m);
}
double area()
{
return(pi*x);
}
}
class Triangle extends Figure
{
Triangle(double d1,double d2)
{
....etc

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import java.io.*;
class Arraysum
{
int temp;
int sum(int a,int n)
{
if(n==1)
return a;
else
{
temp =sum(a,n-1);
temp=temp+a;
return temp;
}
}
}
class Newarray
{
public static void main(String args)throws IOException
{
DataInputStream dis=new DataInputStream(System.in);
System.out.println(Enter limit);
int n=Integer.parseInt(dis.readLine());
int a=new int;
System.out.println(Enter the array);


fo ....etc

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import java.io.*;
class Mult
{
int c=new int;
void process(int a,int b,int m,int n,int p,int q)
{
for(int i=0;i for(int j=0;j {
c=0;
for(int k=0;k {
c+=a*b;
}
}
System.out.print(Product of two metrices is+\n);
for(int i=0;i {
for(int j=0;j {
System.out.print(c+\t);
}
System.out.print(\n);
}
}
};
class MatrixMult
{
public static void main(String arg)throws IOException
{
Mult am=new Mult();
int ....etc

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PROGRAM TO FIND THE SUM OF ARRAY USING RECURSION ....etc

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Yes, my organization is currently writing software analyzing ECG, your java code to find pqrst will be very helpful. Please send information to [email protected] (Hanfei Yu).

Thank you very much.

Hanfei ....etc

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import java.io.*;
class Vroom
{
int length,width,height;
Vroom()
{
length=width=height=0;
}
Vroom(int l,int w,int h)
{
length=l;
width=w;
height=h;
}
Vroom(Vroom v)
{
length=v.length;
width=v.width;
height=v.height;
}
int volume()
{
return(length*width*height);
}
}


class Newv
{
public static void main(String args)throws IOException
{
DataInputStream dis=new DataInputStream(System.in);
System.out.println(enter the length);
....etc

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import java.io.*;
class Area
{
void area(int l,int b)
{
int ar=l*b;
System.out.println(Area of rectangle=+ar);
}
void area(double r,double h)
{
double ar=(3.14*r*r*h);
System.out.println(Area of circle=+ar);
}
void area(int a)
{
int ar=a*a;
System.out.println(Area of square=+ar);
}
void area(float b,float h)
{
double ar=0.5*b*h;
System.out.println(Area of triangle=+ar);
}
}



class Newar
{
public static void main(String args)throws IOException
{
Area r=new Area();
DataInputStream ....etc

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import java.io.*;
class Broom
{
int length,width,height;
Broom(int l,int w,int h)
{
length=l;
width=w;
height=h;
}
int volume()
{
return(length*width*height);
}
}
class Kroom extends Broom
{
Kroom(int l,int w,int h)
{
super(l,w,h);
}
void display()
{
System.out.println(Volume is:+volume());
}
}

class Nbroom1
{
public static void main(String args)throws IOException
{
DataInputStream dis=new DataInputStream(System.in);
System.out.println(enter the parametrs of bedroom);
System.out.println(ent ....etc

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