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Hey Help Me!

10 replies on 1 page. Most recent reply: Nov 27, 2006 4:43 AM by irfan siddique

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lawrence deopante

Posts: 4
Nickname: enz
Registered: Sep, 2006

Hey Help Me!

Posted: Sep 18, 2006 5:42 PM

i am a freshman computer science stud. and one of my new subject is java programming. we were ask to make a diamond program using for loop and the diamond should be made of (*). I write a diamond program, though its correct, my instructor told me to simplify this using other method. Pls Help Me! many tnx to you!

This is my program;

//Diamond program

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

for (int a=1; a<6; a++){
System.out.print(" ");
for (int b=1; b<6-a; b++)
System.out.print(" ");
for (int c=a; c>=1; c--)
System.out.print("*");
for (int c=2; c<=a; c++)
System.out.print("*");
System.out.println();
}

for (int d=4; d>=1; d--) {
for(int e=6; e>=1+d; e--)
System.out.print(" ");
for( int f=d; f>=1; f--)
System.out.print("*");
for(int f=2; f<=d; f++)
System.out.print("*");
System.out.println();
}
}
}//end

Viswanatha Basavalingappa

Posts: 84
Nickname: viswagb
Registered: Nov, 2003

Re: Hey Help Me!

Posted: Sep 19, 2006 12:58 PM

public class nDiamonda {
public static void main(String[ ] args)
{
int i,j,k,n=24; //n is the number of lines and i,j are used for loops
k=(n%2==0)? n-1:n;
for( i = 0 ; i < n/2 ; i++ )
{
for( j = 0 ; j < k / 2 - i ; j++ )
System.out.print(" ");

for ( j = 0 ; j < i * 2 + 1 ; j++ )
System.out.print("*");
System.out.println();
}
if( n % 2 != 0)
{
for( i = 0 ; i < n ; i++ )
System.out.print("*");

System.out.println();
}
for( i = n/2-1 ; i >= 0 ; i-- )
{
for( j = 0 ; j < k/2 - i ; j++ )
System.out.print(" ");

for( j = 0 ; j < i*2+1 ; j++ )
System.out.print("*");

System.out.println();

}
}
}

anuj singhal

Posts: 4
Nickname: anujs
Registered: Sep, 2006

Re: Hey Help Me!

Posted: Sep 20, 2006 2:50 AM

Will it help?

public class Diamond
{
// Size of the Diamond. Need to be an odd value.
private static int SIZE = 11;

public static void main(String argv[])
{
for(int i=0;i<SIZE;i++)
printLineItem(2*i + 1);
}

private static void printLineItem(int n)
{
int paddingLength = Math.abs(SIZE - n)/2;

String padding = "";
for(int i=0;i<paddingLength;i++)
padding += " ";

String result = padding;
for(int j=0;j<(SIZE - 2*paddingLength);j++)
result += "*";

System.out.println(result + padding);
}

}

Matt Gerrans

Posts: 1153
Nickname: matt
Registered: Feb, 2002

Re: Hey Help Me!

Posted: Sep 20, 2006 3:29 PM

> i am a freshman computer science stud.

Computer science stud? Yeah, right. You wish.

If you were a computer science stud, you would have turned in this:

public class Diamond
{
    public static void main(String[] args)
    {
        System.out.println("   *\n  **\n ***\n****\n***\n**\n*"); // Q.E.D.
    }
}

lawrence deopante

Posts: 4
Nickname: enz
Registered: Sep, 2006

Re: Hey Help Me!

Posted: Sep 26, 2006 5:32 PM

yah ryt... but the instruction is to use the FOR loop... and we are to use system.out.println to output a single char. :p

lawrence deopante

Posts: 4
Nickname: enz
Registered: Sep, 2006

Re: Hey Help Me!

Posted: Sep 26, 2006 5:34 PM

tnx.

Vincent O'Sullivan

Posts: 724
Nickname: vincent
Registered: Nov, 2002

Re: Hey Help Me!

Posted: Sep 27, 2006 8:59 AM

Alternatively (given a spare coffee break);

It's a long way from being the simplest solution except that each method does approx one thing and all the variables have more or less maeningful names...

public class Testpad
{
    public static void main(String[] args){
        int size = 88;
        
        drawTopHalf(size);
        drawBottomHalf(size);
    }
 
    private static void drawTopHalf(int size){
        for (int slice = 0; slice <= size; slice++)
            drawSlice(slice, size);
    }
 
    private static void drawBottomHalf(int size){
        for (int slice = size - 1; slice > 0; slice--)
            drawSlice(slice, size);
    }
 
    private static void drawSlice(int slice, int size){
        drawLeadingSpaces(slice, size);
        drawBody(slice);
        System.out.println();
    }
 
    private static void drawLeadingSpaces(int slice, int size){
        for (int i = 0; i < size - slice; i++)
            System.out.print(" ");
    }
 
    private static void drawBody(int slice){
        int bodyWidth = 2 * slice - 1;
        for (int i = 0; i < bodyWidth; i++)
            System.out.print("*");
    }
}

Todd Blanchard

Posts: 316
Nickname: tblanchard
Registered: May, 2003

Dude, don't give them the answer

Posted: Sep 28, 2006 11:20 PM

These people are your future co-workers. These questions are totally lame. Read a book.

Don't help people with elementary questions like this.

Wonder why your co-workers are morons that can't code? Its because they got all their homework answers off the internet.

Vincent O'Sullivan

Posts: 724
Nickname: vincent
Registered: Nov, 2002

Re: Dude, don't give them the answer

Posted: Sep 29, 2006 2:00 PM

Yep, all true but...

...I only knocked up an answer to see how long it would take me (answer - it took longer to find my penknife, open eclipse, configure a new project, type it out and run it than to work it out, about five minutes all told).

On the other hand, I did resist writing a JUnit tested version.

michael ppppp

Posts: 1
Nickname: mpea
Registered: Oct, 2006

Re: Hey Help Me!

Posted: Oct 1, 2006 9:12 AM

// i made this method so you can input any number using:
// java dimond ..
// and it will make a dimond with length ..

public class dimond{

static String output = new String();
static String space = new String();
static int inputNo;
static int lineNo;

public static void main (String[] args){

int input = Integer.parseInt(args[0]); // get input
inputNo = input;
for(lineNo = 0; lineNo < input; lineNo++){
output = dimond(lineNo); // compute no of stars
space = spaces(lineNo); // compute no of spaces
System.out.print(space + output + "\n"); // writer ourput
}
}

public static String dimond(int x) {

if ( (x < 0) ){
output = "please input a valid number, eg \" java dimond 4 \" ";

}else {
int j;
output = "*";
if (x <= inputNo/2 ){
for (j =0; j < lineNo; j++) {
output = output + "**";
}
}
if (x > inputNo/2){
for (j = inputNo%2; j < inputNo - lineNo; j++) {
output = output + "**";
}
}
}
return output;
}

private static String spaces(int k){
int anum =0;
space = "";
if (k <= inputNo/2){
while (anum < (inputNo/2)- k ){
space += " ";
anum++;
}
k = 0;
}

if (k > inputNo/2){
if (inputNo%2 > 0){space += " ";} // when even numbers are put in
while (anum < inputNo/2 - (inputNo-k) ){
space += " ";
anum++;
}
k = 0;
}
return space;
}

}

irfan siddique

Posts: 1
Nickname: aerogram
Registered: Nov, 2006

Re: Hey Help Me!

Posted: Nov 27, 2006 4:43 AM

public class Dimond
{
public static void main(String[] abc)
{
int dSize = 8;
int width = ((2* dSize) -1) ;
int middleRow = width / 2;
for( int thisRow = 0; thisRow < width; thisRow++ )
{
int numStars = width - (Math.abs((middleRow - thisRow)) * 2);
int numSpaces = (width - numStars) / 2;
int startPos = numSpaces;
int endPos = numSpaces + numStars - 1;
for ( int col = 0; col < width; col++ )
{
if( col < startPos || col > endPos )
System.out.print(" ");
else
System.out.print("*");
}
System.out.println("");
}
}
}

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