Calcuate average with pointer

Hi Guys

I am doing some homework and I have finished the assignment apart from one part. I need to use a function that calcuates the average of all the passed grades. The grade total must be an integer based pointer ( for some bizzare reason ). The grades are integer. The below snippet compiles fine without error but when I run the debug and display the results I get 0.00 for the average.

Code:

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void GradeBook::calculateGradeAverage( double m_StudentAverage, int *pm_GradeTotal, const int SIZE )
{
  m_StudentAverage = (*pm_GradeTotal) / SIZE;
}

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I am thinking the problem is that I am assigning an integer based pointer to a double value? Would a static_cast be an option?

I can post the full code if you need more info.

Thanks in advance.

The right-hand size is an integer division. Cast one of the two operands to double.
But the code still won't have an effect, because modifying the local parameter m_StudentAverage (m_ ? Every convention that uses m_ uses it as a member variable prefix.) has no effect.

i.e. change the double parameter to double&

Or remove it completely if there really is a member variable with the same name.

Quote:

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Originally Posted by Daved

Or remove it completely if there really is a member variable with the same name.

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Yeah, that name really is confusing to use for function parameters, especially if the function is a lot longer than this one.