JAVA

[GTA3Rockstar]

I need to write a java program that outputs a word by the number of chracters it has in the word..

(eg Hello has 5 charactors so the output word repeat hello 5 times) but while using While statments!

 

I have no clue how to do this one lol

 

 

import java.io.*;// User picks starting and ending valueclass count{ public static void main (String[] args ) throws IOException {   BufferedReader stdin = new BufferedReader (new InputStreamReader(System.in));   String inputString;int times;   System.out.println( "Enter the word:" );   inputString = stdin.readLine();   times = inputString.length();   while ( count <= limit )   // less-than-or-equal operator   {     System.out.println(inputString);        } }}

 

[GTA3Rockstar]

Write a program that computes the standard deviation of a set of floating point numbers that the user enters. First the user will say how many numbers N are to follow. Then the program will ask for and read in each floating point number. Finally it will write out the standard deviation. The standard deviation of a set of numbers Xi is:

 

SD = Math.sqrt( avgSquare - avg2 )

 

Here, avg is the average of the N numbers, and avg2 is its square.

 

avgSquare is the average of Xi * Xi. In other words, this is the average of the squared value of each floating point number.

 

For example, if N = 4, say the numbers were:

 

 

Xi Xi * Xi

-----2.0 4.0

-----3.0 9.0

-----1.0 1.0

-----2.0 4.0

----- ------

sum 8.0 18.0

 

then

avg = 8.0/4 = 2.0

avg2 = 4.0

 

avgSquare = 18.0/4 = 4.5

 

SD = Math.sqrt( 4.5 - 4.0 ) = Math.sqrt( .5 ) = 0.7071067812

 

To do this you will need to do several things inside the loop body for each floating point value as it comes in: add it to a sum, square it and add it to a sum of squares. Then after the loop is finished apply the formula.

[facugaich]

I don't know crap about JAVA but I can give you a pseudo-code for the last one.

 

 

read Nfor x = 1 to N    read F    sum = sum + f    sum2 = sum2 + (f * f)end foravg2 = (sum/N)*(sum/N)avgS = sum2/NSD = sqrt( avgS - avg2 ) write SD

 

 

And in your first post you meant without while loops?

[GTA3Rockstar]

I don't know crap about JAVA but I can give you a pseudo-code for the last one.

 

 

read Nfor x = 1 to N    read F    sum = sum + f    sum2 = sum2 + (f * f)end foravg2 = (sum/N)*(sum/N)avgS = sum2/NSD = sqrt( avgS - avg2 ) write SD

 

 

And in your first post you meant without while loops?

With! I got it though, week later but yeah thanks!