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While loops

While loops, Beyond frustrated

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j_delong

21 Aug, 2008 - 10:27 AM

Post #1

New D.I.C Head

Joined: 21 Aug, 2008
Posts: 8

I am trying to obtain input from user and with that information create a diamond. So far all I have is my class started, defined my variables and have asked for user input. Here is the part that gets frustrating....I don't really understand the whole concept of while loops and if/else statements and obviously I can't go any further with a solution. Can someone please guide me in the right direction with this one. This is what I have so far....now what?

java


public class Diamond
{
public static void main (String[] args) throws IO Exception
{
String blank "";
String symbol;
int numCount;
int lineCount = 0;
int width;
int newNum;
PrintWriter outFile;
BufferedReader in;

in=newBufferedReader(new InputStreamReader(System.in));
outFile = new PrintWriter(new FileWriter("diamond.out"));
outFile = new PrintWriter(System.out);
System.out.print("Enter a character to form a diamond");
symbol = in.readLine();
System.out.print("Enter a number for the width of the diamond");
width = in.readLine();
newNum=(width/2);

while (symbol !=null)
{
numCount = Integer.parseInt(symbol);
linecount = 0

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Ak-Emm	RE: While Loops 21 Aug, 2008 - 11:59 AM Post #2
New D.I.C Head Joined: 18 Aug, 2008 Posts: 22 Thanked: 1 times My Contributions	QUOTE(j_delong @ 21 Aug, 2008 - 11:27 AM) I am trying to obtain input from user and with that information create a diamond. So far all I have is my class started, defined my variables and have asked for user input. Here is the part that gets frustrating....I don't really understand the whole concept of while loops and if/else statements and obviously I can't go any further with a solution. Can someone please guide me in the right direction with this one. This is what I have so far....now what? java public class Diamond { public static void main (String[] args) throws IO Exception { String blank ""; String symbol; int numCount; int lineCount = 0; int width; int newNum; PrintWriter outFile; BufferedReader in; in=newBufferedReader(new InputStreamReader(System.in)); outFile = new PrintWriter(new FileWriter("diamond.out")); outFile = new PrintWriter(System.out); System.out.print("Enter a character to form a diamond"); symbol = in.readLine(); System.out.print("Enter a number for the width of the diamond"); width = in.readLine(); newNum=(width/2); while (symbol !=null) { numCount = Integer.parseInt(symbol); linecount = 0 OhhhKy kinda different programing style compared to mine Its actually Kinda straight forward if experimented frequently more easier with Pascal this might be a little unorthodox but if you have a Casio CFX/FX 9860 G plus etc + Calc models look at the manual book on the programming section to help understand better with loops explains well detailed i just stumbled accros this site -----> http://www.cafeaulait.org/javatutorial.html#xtocid190365 might be useful
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Martyr2	RE: While Loops 21 Aug, 2008 - 08:34 PM Post #3
Programming Theoretician Joined: 18 Apr, 2007 Posts: 5,660 Thanked: 313 times Expert In: C/C++, Java, VB, VB.NET, C#, PHP, Web Development, HTML & CSS, Javascript My Contributions	Check out my blog entry about building shapes with loops. My examples take advantage of a for loop, but building it for the while loop will be very easy using my code. It explains how the loops work, shows you some simple shapes like triangles and such and then eventually goes into the code for creating a diamond. Feel free to lift what code you need and play with it. Just modify them to use the while loop if that is what your goal is to use. The link is below... Martyr2's Programming Underground - Building shapes with loops (In java) Hope this helps you out. Enjoy!
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yooxygen	RE: While Loops 22 Aug, 2008 - 07:52 PM Post #4
New D.I.C Head Joined: 20 Jan, 2008 Posts: 15 My Contributions	nice !!
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j_delong	RE: While Loops 25 Aug, 2008 - 04:48 AM Post #5
New D.I.C Head Joined: 21 Aug, 2008 Posts: 8	QUOTE(Martyr2 @ 21 Aug, 2008 - 09:34 PM) Check out my blog entry about building shapes with loops. My examples take advantage of a for loop, but building it for the while loop will be very easy using my code. It explains how the loops work, shows you some simple shapes like triangles and such and then eventually goes into the code for creating a diamond. Feel free to lift what code you need and play with it. Just modify them to use the while loop if that is what your goal is to use. The link is below... Martyr2's Programming Underground - Building shapes with loops (In java) Hope this helps you out. Enjoy! QUOTE(Martyr2 @ 21 Aug, 2008 - 09:34 PM) Check out my blog entry about building shapes with loops. My examples take advantage of a for loop, but building it for the while loop will be very easy using my code. It explains how the loops work, shows you some simple shapes like triangles and such and then eventually goes into the code for creating a diamond. Feel free to lift what code you need and play with it. Just modify them to use the while loop if that is what your goal is to use. The link is below... Martyr2's Programming Underground - Building shapes with loops (In java) Hope this helps you out. Enjoy! QUOTE(j_delong @ 21 Aug, 2008 - 11:27 AM) I am trying to obtain input from user and with that information create a diamond. So far all I have is my class started, defined my variables and have asked for user input. Here is the part that gets frustrating....I don't really understand the whole concept of while loops and if/else statements and obviously I can't go any further with a solution. Can someone please guide me in the right direction with this one. This is what I have so far....now what? java public class Diamond { public static void main (String[] args) throws IO Exception { String blank ""; String symbol; int numCount; int lineCount = 0; int width; int newNum; PrintWriter outFile; BufferedReader in; in=newBufferedReader(new InputStreamReader(System.in)); outFile = new PrintWriter(new FileWriter("diamond.out")); outFile = new PrintWriter(System.out); System.out.print("Enter a character to form a diamond"); symbol = in.readLine(); System.out.print("Enter a number for the width of the diamond"); width = in.readLine(); newNum=(width/2); while (symbol !=null) { numCount = Integer.parseInt(symbol); linecount = 0
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JeroenFM	RE: While Loops 25 Aug, 2008 - 09:10 AM Post #6
D.I.C Head Joined: 30 Jun, 2008 Posts: 191 Thanked: 9 times Dream Kudos: 100 My Contributions	The next step is obvious: complete your code, you're missing the bottom half or so. Loops are easy: java while (boolean_expression) { stuff(); } for (int i = 0; i < 10; i++) { stuff(); } The top loop will first check boolean_expression, then if it evaluates to true, will execute what's between the curly brackets. It will then keep doing this until boolean_expression evaluates to false. The bottom loop has a variable i which starts at 0, is incremented after each repetition of the loop (the i++ statement) and will keep doing so until i < 10 evaluates to false, which happens if i equals 10 or higher. Clear enough?
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j_delong	RE: While Loops 27 Aug, 2008 - 09:01 AM Post #7
New D.I.C Head Joined: 21 Aug, 2008 Posts: 8	I have successfully finished my diamond program. Thank you for all the help guys!!!
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