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Nov 7th, 2009

help..

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hello

Can u help me ?

write an java program that outputs the following pattern. The program shuold prompt the user an odd number of lines (limit 1 to 11) .

For example, if the user prompt the number of the lines is 9, then the output should be:

+
++
+++
++++
+++++
++++
+++
++
+

alreem

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Nov 7th, 2009

Re: help..

Hi alreem,

We can only help you if you show that you have made some sort of an attempt. Do you have an algorithm or some code that you have tried? We may be able to point you in the right direction if we can see what you are thinking...

darkagn

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Nov 8th, 2009

Re: help..

I tried this one, but there is some thing wrong >!

package javaapplication3;
import java.util.Scanner;
public class main {

public static void main(String[] args) {
Scanner read= new Scanner(System.in);

int count,i,number;
System.out.print("Enter the number: ");
number= read.nextInt();
if (number%2==0)
System.out.println(" Plz enter an odd number");
else
System.out.println(" The number is odd ");

count=1;
while (count<= number)
{
i=1;
while(i<=count)
{
System.out.print(count);
i=i+1;
}
System.out.println();
count=count+1;
}

count=(number-1);
while (count<=(number-1))
{
i=1;
while(i<=count)
{
System.out.print(count);
i=i+1;
}
System.out.println();
count=count-1;

}

}

}

alreem

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Nov 8th, 2009

Re: help..

Hi alreem,
please next time use the [code] tags to enclose your code,

Java Syntax (Toggle Plain Text)
public static void main(String[] args) {
		Scanner read= new Scanner(System.in);
 
		int count,i,number;
		System.out.print("Enter the number: ");
		number= read.nextInt();
		if (number%2==0){
			System.out.println(" Plz enter an odd number");
			// here you should read the number again until it's odd or 
			// use System.exit() to exit the program
		}
		else
			System.out.println(" The number is odd ");
 
		count=1;
		//while (count<= number){
		while (count<= (number/2)+1){	// loop until you get to the middle number
			i=1;
			while(i<=count){
				//System.out.print(count);
				System.out.print("+");
				i=i+1;
			}
			System.out.println();
			count=count+1;
		}
 
		//count=(number-1); // this will go into an infinite loop 			
		//while (count<=(number-1)){ //since the counter will be always 
						// smaller then (number-1)
		count = (number/2); // now starting from the middle
		while (count > 0){ // go backward 
			i=1;
			while(i<=count){
				// System.out.print(count);
				System.out.print("+");
				i=i+1;
			}
			System.out.println();
			count=count-1;
		}		
	}
public static void main(String[] args) {
		Scanner read= new Scanner(System.in);

		int count,i,number;
		System.out.print("Enter the number: ");
		number= read.nextInt();
		if (number%2==0){
			System.out.println(" Plz enter an odd number");
			// here you should read the number again until it's odd or 
			// use System.exit() to exit the program
		}
		else
			System.out.println(" The number is odd ");

		count=1;
		//while (count<= number){
		while (count<= (number/2)+1){	// loop until you get to the middle number
			i=1;
			while(i<=count){
				//System.out.print(count);
				System.out.print("+");
				i=i+1;
			}
			System.out.println();
			count=count+1;
		}
		
		//count=(number-1); // this will go into an infinite loop 			
		//while (count<=(number-1)){ //since the counter will be always 
						// smaller then (number-1)
		count = (number/2); // now starting from the middle
		while (count > 0){ // go backward 
			i=1;
			while(i<=count){
				// System.out.print(count);
				System.out.print("+");
				i=i+1;
			}
			System.out.println();
			count=count-1;
		}		
	}

anyway I hope I didn't just served the code to you and that you will understand what's modified

GL

AndreiDMS

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Nov 8th, 2009

Re: help..

hi ,

I understand it ,, but if I want the pattern like this
...............+
.............+++
..........+++++
........+++++++
......... +++++
............+++
..............+
hoW i will do it ...?
WITHOUT THE DOTS.

Thanks So Much 4 helpinG ..
=)

Last edited by alreem; Nov 8th, 2009 at 4:25 pm.

alreem

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Nov 9th, 2009

Re: help..

>>?

alreem

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Nov 9th, 2009

Re: help..

You should find a formula for computing the withe spaces for each line and add it to the code.
Something like:

for the longest line you need 7 "+" signs
then for the first line you need 1 "+" sign and 3 spaces in the right side
for the second line you need 3 "+" signs and 2 spaces
for the third line you need 5 "+" signs and 1 space
so we have ...
space_characters = (longest_line + 1) / 2 - line_number;
plus_characters = line_number *2 - 1;

of course in your code, inside while loops you will use:

Java Syntax (Toggle Plain Text)
int space_characters = (number + 1) / 2 - count;
int plus_characters = count * 2 -1;
for (int k = 0; k < space_characters; k++)
  System.out.println(" ");
for (int k = 0; k < plus_characters; k++)
  System.out.println("+");
int space_characters = (number + 1) / 2 - count;
int plus_characters = count * 2 -1;
for (int k = 0; k < space_characters; k++)
  System.out.println(" ");
for (int k = 0; k < plus_characters; k++)
  System.out.println("+");

or something like that ...
though you might not get the same pattern on screen because the width of the " " sign might be smaller than the one of the "+"

AndreiDMS

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Nov 12th, 2009

Re: help..

emm

how I do it ?

alreem

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Nov 13th, 2009

Re: help..

Plz , help me ...

I did not know how to do it . . ?

alreem

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Nov 13th, 2009

Re: help..

Try this:

Java Syntax (Toggle Plain Text)
public static void main(String[] args) {
		Scanner read= new Scanner(System.in);
 
		int count,i,number;
		System.out.print("Enter the number: ");
		number= read.nextInt();
		if (number%2==0){
			System.out.println(" Plz enter an odd number");
			// here you should read the number again until it's odd or 
			// use System.exit() to exit the program
		}
		else
			System.out.println(" The number is odd ");
 
		count=1;
		//while (count<= number){
		while (count<= (number/2)+1){	// loop until you get to the middle number
			int space_characters = (number + 1) / 2 - count;
			int plus_characters = count * 2 -1;
			for (int k = 0; k < space_characters; k++)
			  System.out.print(" ");
			for (int k = 0; k < plus_characters; k++)
			  System.out.print("+");
			}
			System.out.println();
			count=count+1;
		}
 
		//count=(number-1); // this will go into an infinite loop 			
		//while (count<=(number-1)){ //since the counter will be always 
						// smaller then (number-1)
		count = (number/2); // now starting from the middle
		while (count > 0){ // go backward 
			int space_characters = (number + 1) / 2 - count;
			int plus_characters = count * 2 -1;
			for (int k = 0; k < space_characters; k++)
			  System.out.print(" ");
			for (int k = 0; k < plus_characters; k++)
			  System.out.print("+");
			}
			System.out.println();
			count=count-1;
		}		
	}
public static void main(String[] args) {
		Scanner read= new Scanner(System.in);

		int count,i,number;
		System.out.print("Enter the number: ");
		number= read.nextInt();
		if (number%2==0){
			System.out.println(" Plz enter an odd number");
			// here you should read the number again until it's odd or 
			// use System.exit() to exit the program
		}
		else
			System.out.println(" The number is odd ");

		count=1;
		//while (count<= number){
		while (count<= (number/2)+1){	// loop until you get to the middle number
			int space_characters = (number + 1) / 2 - count;
			int plus_characters = count * 2 -1;
			for (int k = 0; k < space_characters; k++)
			  System.out.print(" ");
			for (int k = 0; k < plus_characters; k++)
			  System.out.print("+");
			}
			System.out.println();
			count=count+1;
		}
		
		//count=(number-1); // this will go into an infinite loop 			
		//while (count<=(number-1)){ //since the counter will be always 
						// smaller then (number-1)
		count = (number/2); // now starting from the middle
		while (count > 0){ // go backward 
			int space_characters = (number + 1) / 2 - count;
			int plus_characters = count * 2 -1;
			for (int k = 0; k < space_characters; k++)
			  System.out.print(" ");
			for (int k = 0; k < plus_characters; k++)
			  System.out.print("+");
			}
			System.out.println();
			count=count-1;
		}		
	}

AndreiDMS

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