Thread: probably something simple I'm overlooking

I can't seem to figure out what I am doing wrong with passing the parameters between functions. I know that the calculations are correct (they are simple) and in the getTestScores function I went ahead and tested the calculations to make sure. It seems like the values for test1, 2 and 3 aren't being stored in memory as whatever I input gives a value of 0. getTestScores and displayAverage both need to be void functions and that's what I'm struggling with I think.

-------------------------Here's the code-------------------------

Code:

#include <iostream>
#include <iomanip>

using std::cout;
using std::cin;
using std::endl;
using std::fixed;
using std::setprecision;

//function prototypes
void getTestScores (double, double, double);
double calcAverage (double, double, double, double);
void displayAverage (double); //void function, no return value to main.

int main()
{

	//declare variables & initialize
	double average = 0.0;
	double test1 = 0.0;
	double test2 = 0.0;
	double test3 = 0.0;

	//call function to get test scores
	getTestScores (test1, test2, test3);
	
	//call function to calculate average
	calcAverage (average, test1, test2, test3);
	
	//call function to display average
	displayAverage (average);

	system ("pause");
	return 0;
}   //End of the main function

//*************************Function Definitions**********************

//Get Test Scores function
void getTestScores (double test1, double test2, double test3)
{
	cout << "Enter the first test score: ";
	cin >> test1;
	cout << "Enter the second test score: ";
	cin >> test2;
	cout << "Enter the third test score: ";
	cin >> test3;
}	//end of getTestScores function

//Calculate Average function (return average value)
double calcAverage (double average, double test1, double test2, double test3)
{
	average = (test1 + test2 + test3) / 3;
	return average;
}	//end of calcAverage function

//Display Average function (double)
void displayAverage (double average)
{			
	cout << "The average of the three scores you entered is: " << average << endl;
}	//end of displayAverage function

Any help would be greatly appreciated by this noob!

where does the return of calcAverage go?

argh, I figured it out. Had a couple of issues actually and taking a break and coming back to it it was obvious.