What am I doing wrong;

[acharles]

OK dont' punish me to bad on my code, but I was trying to pass a calculation through a program defined function. Everything initialized properly nothing was displayed what did I do wrong any help would be greatly appreciated thanks in advance

#include <iostream>
#include <iomanip>
#include <cmath>
using namespace std;

double calcAvg();

int main()
{
    calcAvg;
    return 0;
}

double calcAvg(double n1, double n2, double n3)
{
    int num1 ;
    int num2 ;
    int num3 ;
    int total;
    double avg;
    
    avg = (num1 + num2 + num3) / 3;
    
    cout <<"Enter your first Number: ";
    cin >> num1;
    cout <<"Enter your Second Number: ";
    cin >> num2;
    cout <<"Enter your third Number: ";
    cin >> num3;
    cout <<"The Average is: " << avg << endl;
    cout << fixed << setprecision (1);
    
    return avg;
}

[Peter87]

You can't calculate the average before you have the numbers.