Programming Forums > Application Development > Java

crawforddavid2006 · Oct 28th, 2005, 9:47 PM

How would I make a program that finds the average from a bunch of numbers the user inputs. The user would also input first how many numbers he/she will put in.

iignotus · Oct 28th, 2005, 10:16 PM

An average, or mean, is defined as the sum of all the input divided by how many inputs there were.

Just count how many inputs you get, then make a loop to add them all up, then divide. Easy.

Jessehk · Oct 29th, 2005, 12:36 AM

well, I assume you know how to find the average of numbers

eg:

1,
2,
3,
4

10
----
4

2.5 = average.

So, just apply this to the program. Get this inputs, add them up, and divide by the number of inputs you get.

crawforddavid2006 · Oct 29th, 2005, 12:54 AM

ok thanks for the help that seems a lot easier than i thought

crawforddavid2006 · Oct 29th, 2005, 1:44 AM

I still cant figure out how it is supposed to find the average. Could some one please help me figure out the loop that I need to use so that i can find the average.

pal · Oct 29th, 2005, 2:27 AM

Try importing scanner, to receive input from the user. If you're trying to get the complete source from here, mind as well you can search through open source code sites for the average calculating program. I think it will be prtty easy to find, but if you don't get it I can post one too.

Mjordan2nd · Oct 29th, 2005, 11:39 AM

Post some code, and we can go from there.

crawforddavid2006 · Oct 29th, 2005, 2:47 PM

Just for a heads up I use something called the keyboard class. It works the same way as importing the scanner.

(Toggle Plain Text)

import cs1.Keyboard;

public class Average
{
    public static void main(String[] args)
    {
        System.out.println("Enter the number of numbers that you would like to find the average of: ");
        double num1 = Keyboard.readInt();
        for(double i = 1; i <= num1; i++)
        {
            int newNum = 0;
            System.out.println("Enter a number: ");
            double num2 = Keyboard.readInt();
            double average = 0;
            average = (average + num2) / i;
            if(i == num1 + 1)
            {
                System.out.println("The average is: " + average);
            }
        }
    }
}

Kaja Fumei · Oct 29th, 2005, 3:00 PM

You don't have to "average" with every new number. You just find the sum of all the numbers and then when the loop is done, you divide by the total number of inputs and that's your average.

(Toggle Plain Text)

import cs1.Keyboard;

public class Average
{
    public static void main(String[] args)
    {
        double sum = 0.0, average;

        System.out.println("Enter the number of numbers that you would like to find the average of: ");
        double num1 = Keyboard.readInt();
        for(double i = 1; i <= num1; i++)
        {
            System.out.println("Enter a number: ");
            double num2 = Keyboard.readInt();
            sum += num2;
        }

         average = sum / num1;
         System.out.println("The average is: " + average);
    }
}

crawforddavid2006 · Oct 29th, 2005, 6:38 PM

Thankyou so much that helped a lot.

Oct 28th, 2005, 9:47 PM	#1
crawforddavid2006 Expert Programmer Join Date: Apr 2005 Location: Not sure yet Posts: 597 Rep Power: 0	Finding Average How would I make a program that finds the average from a bunch of numbers the user inputs. The user would also input first how many numbers he/she will put in.

Oct 28th, 2005, 10:16 PM	#2
iignotus Professional Programmer Join Date: Apr 2005 Location: Nowhere Special Posts: 466 Rep Power: 4	An average, or mean, is defined as the sum of all the input divided by how many inputs there were. Just count how many inputs you get, then make a loop to add them all up, then divide. Easy. __________________ (Toggle Plain Text) % rc4 hexkey < input > output #define S ,t=s[i],s[i]=s[j],s[j]=t /* rc4 hexkey <file / unsigned char k[256],s[256],i,j,t;main(c,v,e)charv;{++v;while(++i)s[ i]=i;for(c=0;(v)++;k[c++]=e)sscanf((v)++-1,"%2x",&e);while(j+=s[i] +k[i%c]S,++i);for(j=0;c=~getchar();putchar(~c^s[t+=s[i]]))j+=s[++i]S;}

Oct 29th, 2005, 12:36 AM	#3
Jessehk The Oblivious One Join Date: May 2005 Location: Ontario, Canada Posts: 648 Rep Power: 4	well, I assume you know how to find the average of numbers eg: 1, 2, 3, 4 10 ---- 4 2.5 = average. So, just apply this to the program. Get this inputs, add them up, and divide by the number of inputs you get. __________________ Dr. Zoidberg: [ecstatic] I'm going to a movie... with FRIENDS!

Oct 29th, 2005, 11:39 AM	#7
Mjordan2nd The Supreme Ruler Join Date: May 2004 Location: Houston Posts: 1,476 Rep Power: 6	Post some code, and we can go from there. __________________ "Every gun that is made, every warship launched, every rocket signifies, in the final sense, a theft from those who hunger and are not fed, from those who are cold and are not clothed. The world in arms is not spending money alone. It is spending the sweat of its laborers, the genius of its scientists, the hopes of its children." - Dwight D. Eisenhower

Oct 29th, 2005, 2:47 PM	#8
crawforddavid2006 Expert Programmer Join Date: Apr 2005 Location: Not sure yet Posts: 597 Rep Power: 0	Just for a heads up I use something called the keyboard class. It works the same way as importing the scanner. (Toggle Plain Text) import cs1.Keyboard; public class Average { public static void main(String[] args) { System.out.println("Enter the number of numbers that you would like to find the average of: "); double num1 = Keyboard.readInt(); for(double i = 1; i <= num1; i++) { int newNum = 0; System.out.println("Enter a number: "); double num2 = Keyboard.readInt(); double average = 0; average = (average + num2) / i; if(i == num1 + 1) { System.out.println("The average is: " + average); } } } } import cs1.Keyboard; public class Average { public static void main(String[] args) { System.out.println("Enter the number of numbers that you would like to find the average of: "); double num1 = Keyboard.readInt(); for(double i = 1; i <= num1; i++) { int newNum = 0; System.out.println("Enter a number: "); double num2 = Keyboard.readInt(); double average = 0; average = (average + num2) / i; if(i == num1 + 1) { System.out.println("The average is: " + average); } } } }

Oct 29th, 2005, 12:54 AM	#4
crawforddavid2006 Expert Programmer Join Date: Apr 2005 Location: Not sure yet Posts: 597 Rep Power: 0	ok thanks for the help that seems a lot easier than i thought

Oct 29th, 2005, 1:44 AM	#5
crawforddavid2006 Expert Programmer Join Date: Apr 2005 Location: Not sure yet Posts: 597 Rep Power: 0	I still cant figure out how it is supposed to find the average. Could some one please help me figure out the loop that I need to use so that i can find the average.

Oct 29th, 2005, 2:27 AM	#6
pal Programmer Join Date: Mar 2005 Location: Washington Posts: 91 Rep Power: 4	Try importing scanner, to receive input from the user. If you're trying to get the complete source from here, mind as well you can search through open source code sites for the average calculating program. I think it will be prtty easy to find, but if you don't get it I can post one too.

Oct 29th, 2005, 3:00 PM	#9
Kaja Fumei Hobbyist Programmer Join Date: Oct 2005 Posts: 134 Rep Power: 4	You don't have to "average" with every new number. You just find the sum of all the numbers and then when the loop is done, you divide by the total number of inputs and that's your average. (Toggle Plain Text) import cs1.Keyboard; public class Average { public static void main(String[] args) { double sum = 0.0, average; System.out.println("Enter the number of numbers that you would like to find the average of: "); double num1 = Keyboard.readInt(); for(double i = 1; i <= num1; i++) { System.out.println("Enter a number: "); double num2 = Keyboard.readInt(); sum += num2; } average = sum / num1; System.out.println("The average is: " + average); } } import cs1.Keyboard; public class Average { public static void main(String[] args) { double sum = 0.0, average; System.out.println("Enter the number of numbers that you would like to find the average of: "); double num1 = Keyboard.readInt(); for(double i = 1; i <= num1; i++) { System.out.println("Enter a number: "); double num2 = Keyboard.readInt(); sum += num2; } average = sum / num1; System.out.println("The average is: " + average); } }

Oct 29th, 2005, 6:38 PM	#10
crawforddavid2006 Expert Programmer Join Date: Apr 2005 Location: Not sure yet Posts: 597 Rep Power: 0	Thankyou so much that helped a lot.

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Programming Forums > Application Development > Java

Finding Average