Why is the compiler ignoring my void function?

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

void fillBox(int magicbox[19][19], int n);
void createBox(int magicbox[19][19], int n);

ofstream outfile;
int main()
{
    outfile.open("output.txt");
    int magicnumber; //intermediate variable
    outfile << "Welcome to  the Magic Square Program!" << endl << endl;
    cout << "Welcome to  the Magic Square Program!" << endl << endl;

    cout << "Enter an odd number: ";
    cin >> magicnumber;
    outfile << "Number user entered: " << magicnumber << endl;

    if (magicnumber % 2 == 0){
        do{ //this loop only allows the user to input odd integers
            cout << "Please input odd integers only: " << endl;
            cin >> magicnumber;
        }while (magicnumber % 2 == 0);
        }
        cout << "Magic Box#: " << " > " << magicnumber << " <" << endl << endl;
        outfile << "Magic Box#: " << " > " << magicnumber << " <" << endl << endl;

system("pause");
return 0;
}
void createBox(int magicbox[19][19], int n){
    for (int i = 0; i <(n * n); i++){
    for (int x = 0; x < n; x++){
    for (int y = 0; y<n; y++){
        cout << magicbox[x][y];
        }
    }
    cout << endl;
}
    }