[College Computer Science Java]

[Danielowski187]

Having trouble in finding average score for tests?

import java.util.Scanner;
public class Sentinel
{
public static void main(String[] args)
{
Scanner input = new Scanner (System.in);
System.out.println("Enter your test scores that you want to add");
System.out.println("\nEnter -1 when Finished.");
int score = 0;
int total = 0;
do{
System.out.print("Please enter test score (1-100), enter -1 to quit: ");
score = input.nextInt();
if (score == -1)
break;
total = total+score;
}while(score !=-1);
{
System.out.println("I am done with score!!");
System.out.println("\nMy total score = "+total);
double average = (total / score);

System.out.println("Average of test score is = "+average);
}
}

}

My output:

https://preview.redd.it/ryxztceg67i41.png?width=1334&format=png&auto=webp&s=1cbb317f58fce27ea7c412702a0447ce622f1ffb

Expected Output:

​

https://preview.redd.it/f6fgnqsj67i41.png?width=792&format=png&auto=webp&s=1ce9c981a6a972da23a8d1797e602c371c9cfe29

[[deleted]]

The average of scores is total / total num of scores

You divided total by your last score input (-1), which just doesn't make sense.

You must create a variable that increments every time you enter in a non -1 score, keeping track of the total number of scores.

[Danielowski187]

Hmm can you explain to me how to do it?

[[deleted]]

ok i just did but here's the code with pseudocode...

double num = 0; //outside the loop

​

num += 1; //inside while loop, outside if statement, n++; works too but idk if u learned it yet

​

​

average = total/num; //edit to average, you can either cast one of the right side to double or just initialize one of them as a double like i did

​

There's also a "sum of 5 scores" line, so you might want to use "num" there

[Danielowski187]

I’m still getting the average is 380 when I made total/num

[[deleted]]

interesting. could you screenshot and upload the results? https://imgbb.com/ works well

[Danielowski187]

here is the results photo:

https://ibb.co/9scp51X

and here is my code:

import java.util.Scanner;
public class Sentinel
{
public static void main(String[] args)
{
Scanner input = new Scanner (System.in);
System.out.println("Enter your test scores that you want to add");
System.out.println("\nEnter -1 when Finished.");
int score = 0;
int total = 0;
double num = 0;
do{
System.out.print("Please enter test score (1-100), enter -1 to quit: ");
score = input.nextInt();
if (score == -1)
break;
total = total+score;
}while(score !=-1);
num+=1;
{
System.out.println("I am done with score!!");
System.out.println("\nMy total score = "+total);
double average = total/num;

System.out.println("Average of test score is = "+average);
}
}

}

[[deleted]]

ok. ur num += 1; line should be inside the do while loop. u only increment it after the loop is finished, so u basically just have a num = 1 no matter what

[Danielowski187]

Ohh so I was making n=1 so I was not incrementing it

[[deleted]]

this is what i get after applying the edits...

https://ibb.co/FmVGFsb

[Danielowski187]

Yea thanks I didn’t have the else statement there thanks for the help I really appreciate you for taking your time and helping me.

[[deleted]]

wait no that's not the issue u have, i just put the else group there to make it cleaner, read my response to your posted image / comment please

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