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How 2 print out Pyramid?

Subject: How 2 print out Pyramid? · Posted: 2006-09-20, 03:30am

Rank: ? (5)
Member #: 28493

Hey, anyone knows how to use standard input and output to get this thing.. Using duplicateString();

For example, duplicateString("*", 5) returns the string "*****", duplicateString(" ", 3) returns a string with three spaces;

Code:

//This is the output we suppose to get
pyramid height: 1
*
* *

» Post edited 2006-09-20, 03:35am by what2do.

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uni

Subject: Re: How 2 print out Pyramid? · Posted: 2007-05-02, 01:00pm

Rank: ? (142)
Member #: 6881

Try this: Code:

//TriangleMaker....wooo!
import javax.swing.*;
public class TriangleMaker{
int height;
public TriangleMaker(int height){
this.height = height;
}
public String duplicateString(String symbol, int num){
String t = "";
if(symbol == null)
return "";
for(int i = 0; i <= num; i++)
t += symbol+ " ";
return t;
}
public String toString(){
String s = "Pyramid Height: " + height + "\n";
for(int i = 0; i <= height; i++){
if( ((height-i) % 2) != 0)
s += " ";
s += this.duplicateString(" ", (int)(height - i)/2 ) + this.duplicateString("*",i) +"\n";
}
return s;
}
public static void main(String[] args){
String n = JOptionPane.showInputDialog("Pyramid Height: ", "1");
int n1 = Integer.parseInt(n);
System.out.println(new TriangleMaker(n1));
}
}

I just noticed that the original post was made back in september....wooo! and what happened to the cool colored code blocks

Holla

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Dino

Subject: Re: How 2 print out Pyramid? · Posted: 2007-06-02, 12:24pm

Rank: ? (383)
Member #: 867

StringBuilder may be a more efficient solution if your temporary string is going to be appended to several times (as in uni's code).

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