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Java Again.. Well not really... Maybe a little :)

K

Krueger81

Diamond Member
each worker receives 5% raise each year.

lets say I type in 20000 for starting salary and the dude is age 65 how would I computer that each year

here is the code I have so far and it gives me 21000 as the asnwer. I know my math is not right somewhere


WHOLE CODE:

import java.io.*;

public class problem6
{
public static void main(String[] args)
throws java.io.IOException
{
double age, lcv, startsalary, endsalary = 0;
String s1, s2, s3;

InputStreamReader isr = new InputStreamReader(System.in);
BufferedReader br = new BufferedReader(isr);

System.out.println ("Please enter your name:");
s1 = br.readLine().toUpperCase();

System.out.println ("Please enter your age:");
s2 = br.readLine();
age = Double.parseDouble(s2);

System.out.println ("Please enter your starting salary:");
s3 = br.readLine();
startsalary = Double.parseDouble(s3);

for (lcv = 0; lcv <= 65; lcv++)

{
endsalary = (startsalary *= 1.05);

}

System.out.println (age + "\t" +s1+ "\t" +startsalary);
System.out.println (endsalary);
}
}
 
for (lcv = 0; lcv <= age; lcv++)

{
startsalary = startsalary + (startsalary *.05);
}
 
well that got me closer

but doesn't it have to be yr 1+5% +y2 +5% and then you ad those together till you get to the year that you have typed in?
 
Well in VB it's this:
function whatever(PayStart as long, Years as long)

for i=1 to Years
PayStart = PayStart * 1.05
next i
end function
Click to expand...
So in java it should be this
for (lcv = 0; lcv <= age; lcv++)

{
startsalary = startsalary + (startsalary *.05);
}
Click to expand...

what am I missing?

this should work too

for (lcv = 0; lcv <= age; lcv++)

{
startsalary = (startsalary *1.05);
}
Click to expand...


Doesn't this work:
import java.io.*;

public class problem6
{
public static void main(String[] args)
throws java.io.IOException
{
double age, lcv, startsalary, endsalary = 0;
String s1, s2, s3;

InputStreamReader isr = new InputStreamReader(System.in);
BufferedReader br = new BufferedReader(isr);

System.out.println ("Please enter your name:");
s1 = br.readLine().toUpperCase();

System.out.println ("Please enter your age:");
s2 = br.readLine();
age = Double.parseDouble(s2);

System.out.println ("Please enter your starting salary:");
s3 = br.readLine();
startsalary = Double.parseDouble(s3);

for (lcv = 0; lcv <= 65; lcv++)

{
startsalary = (startsalary * 1.05);

}

System.out.println (age + "\t" +s1+ "\t" +startsalary);
System.out.println (startsalary);
}
}
Click to expand...
 
Originally posted by: Evadman
Well in VB it's this:
function whatever(PayStart as long, Years as long)

for i=1 to Years
PayStart = PayStart * 1.05
next i
end function
Click to expand...
So in java it should be this
for (lcv = 0; lcv <= age; lcv++)

{
startsalary = startsalary + (startsalary *.05);
}
Click to expand...

what am I missing?

this should work too

for (lcv = 0; lcv <= age; lcv++)

{
startsalary = (startsalary *1.05);
}
Click to expand...
Click to expand...

that gives me an answer of 21000

 
Originally posted by: Krueger81
that gives me an answer of 21000
Click to expand...
You were outputting the endsalery, not the startsalery. I changed the code. Try my edit.
 
Originally posted by: Evadman
Originally posted by: Krueger81
that gives me an answer of 21000
Click to expand...
You were outputting the endsalery, not the startsalery. I changed the code. Try my edit.
Click to expand...

here is the actual problem maybe that will help.

" Write a program to estimate how much a young worker will make before retiring at age 65. Request the worker?s name, age, and starting salary as input. Assume the worker receives a 5 percent raise each year. For example, if the user enters Helen, 25, and 20000, then the following should be displayed on your screen:
Helen will earn about $2415995."

Phil
 
Did you try my edit?

import java.io.*;

public class problem6
{
public static void main(String[] args)
throws java.io.IOException
{
double age, lcv, startsalary, endsalary = 0;
String s1, s2, s3;

InputStreamReader isr = new InputStreamReader(System.in);
BufferedReader br = new BufferedReader(isr);

System.out.println ("Please enter your name:");
s1 = br.readLine().toUpperCase();

System.out.println ("Please enter your age:");
s2 = br.readLine();
age = Double.parseDouble(s2);

System.out.println ("Please enter your starting salary:");
s3 = br.readLine();
startsalary = Double.parseDouble(s3);

for (lcv = 0; lcv <= 65; lcv++)

{
startsalary = (startsalary * 1.05);

}

System.out.println (age + "\t" +s1+ "\t" +startsalary);
System.out.println (startsalary);
}
}
Click to expand...

I am just assuming it would work really. *shrug*
 
Originally posted by: Krueger81
Originally posted by: Evadman
Originally posted by: Krueger81
that gives me an answer of 21000
Click to expand...
You were outputting the endsalery, not the startsalery. I changed the code. Try my edit.
Click to expand...

here is the actual problem maybe that will help.

" Write a program to estimate how much a young worker will make before retiring at age 65. Request the worker?s name, age, and starting salary as input. Assume the worker receives a 5 percent raise each year. For example, if the user enters Helen, 25, and 20000, then the following should be displayed on your screen:
Helen will earn about $2415995."

Phil
Click to expand...

You need a variable that keeps track of earnings.

Add the startsalary to earnings, then multiply startsalary by 1.05.
 
Originally posted by: BigJ
Originally posted by: Krueger81
Originally posted by: Evadman
Originally posted by: Krueger81
that gives me an answer of 21000
Click to expand...
You were outputting the endsalery, not the startsalery. I changed the code. Try my edit.
Click to expand...

here is the actual problem maybe that will help.

" Write a program to estimate how much a young worker will make before retiring at age 65. Request the worker?s name, age, and starting salary as input. Assume the worker receives a 5 percent raise each year. For example, if the user enters Helen, 25, and 20000, then the following should be displayed on your screen:
Helen will earn about $2415995."

Phil
Click to expand...

You need a variable that keeps track of earnings.

Add the startsalary to earnings, then multiply startsalary by 1.05.
Click to expand...

for (lcv = age; lcv <= 65; lcv++)

{
earnings = salary + (salary * .05);
salary = earnings + (salary + (salary * .05));

}

System.out.println (age + "\t" +s1+ "\t" +salary);
System.out.println (earnings);


will this do???

 
Originally posted by: Krueger81
ok this is confusing.

should it not be:

yr1 + 5% = end

end +yr2 +5% =end2 and so on

quote me if I am wrong.
Click to expand...

Math would be like this.

Year 1 = 20000
Year 2 = 20000 * 1.05 (or 21000)
year 3 = 21000 * 1.05 (or 22050)
Year 4 = 22050 * 1.05 (or 23152.5)
Year 5 = 23152.5 * 1.05 (or 24310.125)
etc.

So the math is correct.

Your code probelm is with this:

endsalary = (startsalary *= 1.05)

If that is in a loop, you are continualy setting endsalary to startsalary *= 1.05

You need to add the endsalary again, or you will always get 21000.

Put a printout in the loop, and you will see what I mean.

for (lcv = 0; lcv <= 65; lcv++)

{
endsalary = (startsalary *= 1.05);
System.out.println (endsalary);
}
Click to expand...

yours will output
21000210002100021000210002100021000...
when the rigth answer would be
210002205023152.524310.125...
 
Originally posted by: Krueger81
Originally posted by: BigJ
Originally posted by: Krueger81
Originally posted by: Evadman
Originally posted by: Krueger81
that gives me an answer of 21000
Click to expand...
You were outputting the endsalery, not the startsalery. I changed the code. Try my edit.
Click to expand...

here is the actual problem maybe that will help.

" Write a program to estimate how much a young worker will make before retiring at age 65. Request the worker?s name, age, and starting salary as input. Assume the worker receives a 5 percent raise each year. For example, if the user enters Helen, 25, and 20000, then the following should be displayed on your screen:
Helen will earn about $2415995."

Phil
Click to expand...

You need a variable that keeps track of earnings.

Add the startsalary to earnings, then multiply startsalary by 1.05.
Click to expand...

for (lcv = age; lcv <= 65; lcv++)

{
earnings = salary + (salary * .05);
salary = earnings + (salary + (salary * .05));

}

System.out.println (age + "\t" +s1+ "\t" +salary);
System.out.println (earnings);


will this do???
Click to expand...

No. Think about it outside of the context of code.

Helen starts working at the age of 25 at $20,000 a year. Her total earnings are $20,000 after the first year. She then gets a 5% raise. to $21,000.

After the second year, her total earnings are now $41,000. She gets a 5% raise, and now her salary is $22,050.

After the third year, her total earnings are now $63,050. She gets a 5% raise, and now her salary is $23,152.50.

Now look at your code and tell me why it's wrong.
 
Originally posted by: tfinch2
What level are you? Freshman in college? Quit programming.
Click to expand...

thank you for the kind words.. now go fvck off

for all the others thank you very much for the help
 
If you had used Scanner instead of BufferedReader, i could have helped, but I have never learned buffereedreader, I just use Scanner.
 
Originally posted by: pcnerd37
If you had used Scanner instead of BufferedReader, i could have helped, but I have never learned buffereedreader, I just use Scanner.
Click to expand...

His usage of Scanner or BufferedReader is irrelevant to his problems with the code.
 
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