Algorithm: Solutions to some Star and other pattern problems: Post 4

So lets see the solutions of the pattern problems, once that were asked in previous post and some other too.

Lets start with previously asked problem
As I am more into java I am writing java solution but you can easily implement then in C and C++ too

1.Draw pattern

*****

****

***

**

*

Sol>

public class OpPyramid {
public static void main(String[] args) {

int no = 5;
for(int i=no;i>0;i--)
{
for(int j=0;j<no-i;j++)
System.out.print(" ");

for(int k=i;k>0;k--)
System.out.print("* ");

System.out.println("");
}
}
}
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2. Write
11111
2222
333
44
5

Sol>
public class patnum {

public static void main(String args[])
{
int no=5;
int k=1;
for(int i=0;i<5;i++)
{
for(int j=no;j>i;j--)
{
System.out.print(k);
}
k++;
System.out.println("");
}
}

}

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3. Draw pyramid

*

***

*****

*******

*********

Sol>

public class pyramid {

public static void main(String[] args) {

int no =5;

int i=1,j=1;

for(i=1;i<=no;i++)

{

int k=i;

for(;no-k>0;k++)

System.out.print(" ");

for(j=1;j<=(2*i-1);j++)

{

System.out.print("*");

}

System.out.println();

}

}

}

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4. Draw Kite

   *
   ***
  *****
 *******
*********
 *******
  *****
   ***
    *

class kite
{


      public static void main(String[] args)
      {
            int n = 5;
            for (int i = 1; i <= n; i++)
            {
                  for (int j = 0; j < (n - i); j++)
                        System.out.print(" ");
                  for (int j = 1; j <= i; j++)
                        System.out.print("*");
                  for (int k = 1; k < i; k++)
                        System.out.print("*");
                  System.out.println();
            }

            for (int i = n - 1; i >= 1; i--)
            {
                  for (int j = 0; j < (n - i); j++)
                        System.out.print(" ");
                  for (int j = 1; j <= i; j++)
                        System.out.print("*");
                  for (int k = 1; k < i; k++)
                        System.out.print("*");
                  System.out.println();
            }

            System.out.println();
      }
}

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5.Histogram

import java.util.Scanner;

class HistogramPattern

{

public static void main(String args[])

{

Scanner sc = new Scanner(System.in);

System.out.print("How many numbers do you want to enter: ");

int size = sc.nextInt();

int array[] = new int[size];

for (int i = 0; i < array.length; i++)

{

System.out.print("Enter " + (i + 1) + " element: ");

array[i] = sc.nextInt();

}

System.out.println("\n\t***Horizontal pattern***\n");

for (int i = 0; i < array.length; i++)

{

for (int j = 1; j <= array[i]; j++)

{

System.out.print("* ");

}

System.out.println();

}

System.out.println("\n\t***Vertical***\n");

int max = 0;

for (int i = 0; i < array.length; i++)

{

if (max < array[i])

{

max = array[i];

}

}

for (int i = max; i > 0; i--)

{

for (int j = 0; j < size; j++)

{

if (array[j] >= i)

{

System.out.print("* ");

}

else

{

System.out.print("  ");

}

}

System.out.println();

}

}

}

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6.draw

1 2 3 4 5 4 3 2 1 

1 2 3 4    4 3 2 1 

1 2 3          3 2 1 

1 2                2 1 

1                      1 

sol>

package marlo;

import java.util.Scanner;

class OutPyramid

{

public void draw(int rows)

{

for (int i = rows; i >= 1; i--)

{

for (int j = 1; j <= rows; j++)

{

if (j <= i)

{

System.out.print(j + " ");

}

else

{

System.out.print("  ");

}

}

for (int j = rows; j >= 1; j--)

{

if (j == rows)

{

continue;

}

if (j <= i)

{

System.out.print(j + " ");

}

else

{

System.out.print("  ");

}

}

System.out.println();

}

}

}

class OutPyramidMain

{

public static void main(String args[])

{

Scanner sc = new Scanner(System.in);

OutPyramid op = new OutPyramid();

System.out.print("Enter number of rows: ");

int rows = sc.nextInt();

op.draw(rows);

}

}