Need help with homework exercise on arrays

[Terminus Est]

Ok so this is what the textbook asks me to do.

Write a c++ function, smallestIndex, that takes as parameters an int array and its size and returns the index of the first occurrence of the smallest element in the array. Also, write a program to test your function.

And for the code, this is what I typed.

#include<iostream>

using namespace std;

int smallestIndex(int list[], int listSize);

int main()
{
	int alpha[20];

	cout << "The index of the first occurrence of the smallest element in the array is " << smallestIndex(alpha,20) << endl;

	return 0;
}

int smallestIndex(int list[], int listSize)
{
	int counter;
	int minIndex = 0; //Assuming first element is the smallest
	for (counter = 1; counter < listSize; counter++)
		if (list[minIndex] > list[counter])
			minIndex = counter;
	return minIndex;

}

This does work, however I am getting 0 returned from the function. But somehow I doubt this is what I should get and I think is something else I must do, unless this is of course a stupid exercise.

[Peter87]

specify the values in alpha and you can see if it gives the correct output.

[Terminus Est]

Ok I specified the values {2,4,5,9,11,15}; in alpha and now I am getting 6 as the output. Is this correct?

[Gaminic]

Just read the goal of the exercise. Is 6 the index of the smallest value?

[eypros]

You should adapt your boundary depending on the number of elements you enter. In other words don't check always for 20 elements but for any given value N <=20. Of course in case where alpha = {2,4,5,9,11,15} index 6 is unacceptable (it should be 0-5).

Apart from that I think your code is OK.