How to configure OpenGL in Dev-C++

To run graphics programs in Dev-C++ you need to follow these simple steps....
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Java- Constructors

This program implements constructors in Java( parametric and non-parametric). Comment below. Have fun!!

class cons
{
int x;
cons()
{
this(1);
System.out.println("1");

}
cons(int s)
{
this('d');
System.out.println("2");

}
cons(char c)
{
this(5.6);
System.out.println("3");

}
cons(double f)
{
this(true);
System.out.println("4");

}
cons(boolean b)
{
System.out.println("5");
}
public static void main(String args[])
{
cons c1=new cons();
}
}

Java- Constructor Chaining

This program implements constructor chaining. Comment below. Have fun!!!

//cannot use this and super in same constructor
class X
{
    public X(int i)
     {

     }
}
class Y extends X
{
    public Y(int i)
    {
        super(i);
    }
}
class Z extends Y
{
    public Z(int i)
    {
        super(10);
    }
}
class ChainDemo
{
    public static void main(String[] args)
    {
        Z ob = new Z(10);
    }
}
//finalise with object to force garbage collection

Java- Smallest and Greatest Element of Array

This programs implements array and finds the smallest and greatest element of array. Do comment below. Have fun!!

class Arr
{
    Arr()
    {
    }
    int[] Ret(int a[])
    {
        for(int i=0;i<a.length;i++)
        {
            for(int j=0;j<a.length-1;j++)
            {
                if(a[j]>a[j+1])
                {   
                    int temp=a[j+1];
                    a[j+1]=a[j];
                    a[j]=temp;
                }
            }
        }
        return a;
    }
    public static void main(String ... args)
    {
        Arr a = new Arr();
        int b[]={9,1,3,0,2,4};
        int c[]=a.Ret(b);
        System.out.println("Smallest is"+c[0]);
        System.out.println("Largest is"+c[c.length - 1]);
    }
}
       
       

Java- Arrays

This program shows demo on how to implement arrays in Java. Have Fun!!

class Customer
{
    int id;
    String name;
    public Customer()
    {
        id=0;
        name="";
    }
    public Customer(int i,String n)
    {
        id=i;
        name=n;
    }
}
class ArraysDemo
{
    public static void main(String[] args)
    {
        Customer[] c= new Customer[2]; //object array
        c[0]=new Customer(); //need to initialize
        c[1]=new Customer();
        System.out.println(c[0].name);
        int[] a=new int[10];
        String[] str = new String[5];
        for(String s:str)
        {
            System.out.println(s);
        } //for each loop on string type
        for(int v:a)
        {
            System.out.println(v);
       
        } //for each loop
            for(int i=0;i<a.length;i++)
        {   
            a[i]= new java.util.Scanner(System.in).nextInt();
        }
        for(int i=0;i<a.length;i++)
        {
            System.out.println(a[i]);
        }
        /*System.out.println(i);*/ //error due to scope
        System.out.println(a);
    }
}

Java-Abstract Class

//Abstract Class
abstract class AbstractComponent
{   
    //abstract method can be in abstract class
    protected int height,width;
    public abstract void paint();
    public void setSize(int w, int h)
    {
        height=h;
        width=w;
    }
}
class MyButton extends AbstractComponent
{
    public void paint()
    {
        System.out.println("Paint");
    }
}
class AbstractDemo
{
    public static void main(String[] args)
    {
        MyButton b1 = new MyButton();
        b1.setSize(500,500);
        b1.paint();

    }
}

Matlab- Fibonacci Series

n=input('Pick a number:\n');
fib=zeros(1,n);
fib(1)=1;
fib(2)=1;
k=3;
while k<=n
fib(k)=fib(k-2)+fib(k-1);
k=k+1;
end
fprintf('The fibonacci series to %d terms is \n',n);
fprintf('%g\n',fib);



Matlab- Prime Number

Write a script to check whether entered number is prime number or not. If number is prime then print its square value.

n=input('Pick a number:\n');

count=[2:1:n+5];

k=1;

c=0;

while count(k)~=n

if(rem(n,count(k))~=0)

   

    k=k+1;

else

    c=c+1;

end

end

if c==0

        fprintf('%d is prime',n);

        fprintf('and its square is %d ',n^2);

else

    fprintf('%d is not prime',n);

end

OUTPUT

Pick a number:

3

3 is prime and its square is 9  

Matlab-Number of distinct elements in a matrix

Write a script program to display the number of distinct elements in a matrix?

n=input('Enter number of rows you want in matrix:\n');

m=input('Enter number of columns you want in the matrix:\n');

a=input('Enter a matrix:');

r=1;

c=1;

count=0;

b=reshape(a,1,n*m);

while c<m*n

    if b(1,c)~=b(1,c+1)

        count=count+1;

    end

    c=c+1;

end

disp(count);

OUTPUT

Enter number of rows you want in matrix:

2

Enter number of columns you want in the matrix:

3

Enter a matrix:[1,1,2;3,4,5]

     5