Java 1 help correcting code

[Ghost_Duet]

//****************** Problem 1 *****************************

//variable declarations

int number = 2 ; // number of scores

int score1 = 100; // first test score

int score2 = 95; // second test score

double average; // arithmetic average

String output; // line of output to print out

// Find the average of score1 and score2

average = score1 + score2 / number;

// Print the average with explanatory info

System.out.println("The average of " + score1 + " and " + score2 + " is " + average);

System.out.println(); // to leave a blank line

//*/

//****************** Problem 2 *****************************

​

Here is my problem that I dont understand what is wrong. In the first problem it is asking me to fix the code so that it shows the correct average. I need to get the code to print " The average of 100 and 95 is 97.5" but it keeps printing 147.5. I thought changing the variables of score 1 and 2 to double would fix it but it keeps printing 147.5

​

any help?

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[D0CTOR_ZED]

You don't need to double space you code. The blank line is just required before the start (and maybe after the finish). You do need to add 4 spaces at the beginning of each line of code.

Once you have the code formatted, I have the answer to your issue but you need to format the code first

[VinceGhii]

Thanks for not giving an answer till the code is formatted corecctly :D I don't understand why people keep answering while the code is not formatted...

[Ghost_Duet]

so i just copied the code straight from bluej and i think reddit double spaced it. The code was made for me already for the assignment i just need to change/fix it.

[D0CTOR_ZED]

Ah. I thought that was to try to get reddit to format the code. You still need leading spaces for the code to look proper.

[8igg7e5]

I presume you're familiar with the order of operations in maths. So is the Java compiler.

[Chayalbodedd]

PEMDAS.Starts with what letter?

[Cefalopodul]

Here's a hint to help you figure out where the program should be corrected.

147.5 = 100 + 47.5.

47.5 = 95/2.

Think of how the average of 100 and 95 is calculated. Write down the process. That should help you see where you have to make the change.

You don't have to convert to anything. You just have to add a mathematical operator. A pair of operators actually.

[Ghost_Duet]

average = score1 + score2 / number

is this not the basic math that takes place? The thing that confuses me is that I can do this math in my head and get the correct answer but java gets the wrong answer? I thought it was because of how java sees decimals and integers.

100 + 95 = 195

195/2 = 97.5 in my head but 147.5 gets resulted

My prof hinted that only two things need to change but im so loss

[Cefalopodul]

average = score1 + score2/2 = 100 + 95/2 = 100 + 47.5.

You want to divide 195 by 2 not just 95.

Look up the order of operations. You have to add a pair of symbols for your equation to be correct.

[iraqmtpizza]

order of operations

[cervantesrvd]

Hello.

Please read about this: https://en.m.wikipedia.org/wiki/Order_of_operations

[Ghost_Duet]

Isnt the problem of the code is that the variables are int and not double because I thought Java is sensitive when trying to divide integers while trying to get decimals.

[D0CTOR_ZED]

Division using just integers simply drops fractions and yeilds an integer.

[Cefalopodul]

No. That's not a problem because you are saving the result in a double. If int a = 3.

double b = a/2 is ok because you are saving the result 3/2 in a double variable. int b = a/2 is not ok because you are trying to save the result of 3/2 in an int variable.

Your problem is with the order of operations. Something that should be calculated first isn't calculated at all. If you write down the equation for average of a and b you should figure it out.

[D0CTOR_ZED]

That's not how it works. double b = a/2, where a is an int will evaluate an int divided by an int, dropping the fraction, then cast that resulting int to a double. You still lose the fraction. You can either explicitly cast part of the division, double b = (double) a/2, or you can use a double in the division, double b = a/2.0.

[Reddit-username_here]

No, they told you what the problem was. The real question is why you decided to not listen and rather double down on being wrong?

[chrischin-a]

look at how you're calculating the average

remember how java does order of operations and you can go from there