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Determin the average of an array that generates 30 random numbers.

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Join Date: Oct 2007

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cl3m0ns

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Determin the average of an array that generates 30 random numbers.

Oct 17th, 2007

I am trying to write a program that takes a specif range from the user and generates 30 random numbers in that range. I have that part worked out and the code works fine but I have no clue how to take the average of those 30 random numbers. Could anyone offer some advice that would be great

Thanks

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Join Date: Jul 2004

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gkbush

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Re: Determin the average of an array that generates 30 random numbers.

Oct 17th, 2007

Init a variable to ie Sum = 0;

Run a for loop thirty times to get a total sum.

for( int i = 0; i < 30; i++)
{
Sum = Sum + array[i];
}

Then divide by 30

return Sum/30

That's the average!!

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Join Date: Sep 2004

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Narue

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Re: Determin the average of an array that generates 30 random numbers.

Oct 17th, 2007

Add them to a sum using a loop, then divide by 30. That's generally how one would find the average of a list of numbers:

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
double sum = 0;
 
for ( int i = 0; i < 30; i++ )
  sum += a[i];
 
cout<<"Average: "<< sum / 30 <<'\n';
double sum = 0;

for ( int i = 0; i < 30; i++ )
  sum += a[i];

cout<<"Average: "<< sum / 30 <<'\n';