Можете ли вы проверить мой код 1 предупреждение

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avg = double(num1 + num2 + num3) / 3.0; this line

Что я уже пробовал:

#include <iomanip>

// funtion prototype
double calcAverage(int, int, int);

double getTestScore();

using namespace std;

int main()
{
	//declare variables
	int score1 = 0;
	int score2 = 0;
	int score3 = 0;

	double average = 0.0;

	//get input items
	cout << "First test score: ";
	cin >> score1;
	cout << "Second test score: ";
	cin >> score2;
	cout << "Third test score: ";
	cin >> score3;

	//call function to calculate 
	average = calcAverage(score1, score2, score3);
	cout << "Average: " << average << endl;
	return 0;
} //end of main function


//function definitions

double calcAverage(int num1, int num2, int num3)
{
	double avg = 0.0;

	avg = double(num1 + num2 + num3) / 3.0;

	return avg;
}

double getTestScore()
{
	return 0.0;
}

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