Why do I get these errors?

Question

Hi. I'm getting some erros i can't understand. Also, when I try to run the program it says that it can't find the .exe in the debug folder.

Code:

#include "stdafx.h"
#include <iostream>
#include <cstdlib>
#include <ctime>
#include <cmath>
using namespace System;
using namespace std;

double CalcMean(double, int);


int main(array<System::String ^> ^args)
{
    int choosenNum;
	int *arrayNum;
	double values;
	double nValues;

	cout << "How many values would you like to calculate?";
	cin >> choosenNum;
	arrayNum = new int[choosenNum];

	for(int n=0; n<choosenNum; n++)
	{
		cout << "Enter number: ";
		cin >> arrayNum[n];
	}

	double meanValue = CalcMean(values, nValues);

	cout << "Mean value: " << meanValue << endl;


	Console::ReadKey();

	
}
double CalcMean(double values[], double nValues)
{
	double sum = 0;
    for (int i = 0; i < nValues; ++i)
        sum += values[i];
    return sum / (double(nValues));

}

Errors:
error LNK1120: 2 unresolved externals
error LNK2019: unresolved external symbol
error LNK2028: unresolved token (0A000344)