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Oct 17th, 2007

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

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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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cl3m0ns

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Oct 17th, 2007

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

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!!

gkbush

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Oct 17th, 2007

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

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:

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';

Narue

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Oct 17th, 2007

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

Thanks for you help I don't know why I didn't think of that I think it's just the array thing threw me off or something.

Anyways Thanks alot

cl3m0ns

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