Thread: annoying bugs on working code

hey, im new to the whole programming scene and i made this code to find the mean avrage of things. problem is i cannot get it to do more than three numbers. i will post the code and if you can make any changes to hellp and just leave a post id be more than grateful. thanks in advance.
sam

code;

Code:

#include <iostream>

using namespace std;

int main()
{
        int amount_of_numbers, average, n1, n2, n3, n4, n5, n6, n7, n8, n9, n10;

        cout<<"hello, this program will identify the mean average of a group of numbers that you will input"<<endl;
        cin.get();

        cout<<"please input amount of numbers in group (min - 3, max - 10).\n";
        cin >> amount_of_numbers;

        if (amount_of_numbers >= 3) {
            cout<<"please input first number.\n";
            cin >> n1;

            cout<<"please input second number.\n";
            cin >> n2;

            cout<<"please input last number.\n";
            cin >> n3;

            average = n1+n2+n3/amount_of_numbers;

            cout<<"the average mean of this group of numbers is:";
            cout<< average;
        }


        else if (amount_of_numbers >= 4) {
            cout<<"please input first number.\n";
            cin >> n1;

            cout<<"please input second number.\n";
            cin >> n2;

            cout<<"please input third number.\n";
            cin >> n3;

            cout<<"please input last number.\n";
            cin >> n4;

            average = n1+n2+n3+n4/amount_of_numbers;

            cout<<"the average mean of this group of numbers is:";
            cout<< average;
        }

        else if (amount_of_numbers >= 5)  {
            cout<<"please input first number.\n";
            cin >> n1;

            cout<<"please input second number.\n";
            cin >> n2;

            cout<<"please input third number.\n";
            cin >> n3;

            cout<<"please input fourth number.\n";
            cin >> n4;

            cout<<"please input last number.\n";
            cin >> n5;

            average = n1+n2+n3+n4+n5/amount_of_numbers;

            cout<<"the average mean of this group of numbers is:";
            cout<< average;
        }

        else if (amount_of_numbers = 6)  {
            cout<<"please input first number.\n";
            cin >> n1;

            cout<<"please input second number.\n";
            cin >> n2;

            cout<<"please input third number.\n";
            cin >> n3;

            cout<<"please input fourth number.\n";
            cin >> n4;

            cout<<"please input fifth number.\n";
            cin >> n5;

            cout<<"please input last number.\n";
            cin >> n6;

            average = n1+n2+n3+n4+n5+n6/amount_of_numbers;

            cout<<"the average mean of this group of numbers is:";
            cout<< average;
        }

            else if (amount_of_numbers >= 7)  {
                cout<<"please input first number.\n";
            cin >> n1;

            cout<<"please input second number.\n";
            cin >> n2;

            cout<<"please input third number.\n";
            cin >> n3;

            cout<<"please input fourth number.\n";
            cin >> n4;

            cout<<"please input fifth number.\n";
            cin >> n5;

            cout<<"please input sixth number.\n";
            cin >> n6;

            cout<<"please input last number.\n";
            cin >> n7;

            average = n1+n2+n3+n4+n5+n6+n7/amount_of_numbers;

            cout<<"the average mean of this group of numbers is:";
            cout<< average;
            }

            else if (amount_of_numbers >= 8)  {
                cout<<"please input first number.\n";
            cin >> n1;

            cout<<"please input second number.\n";
            cin >> n2;

            cout<<"please input third number.\n";
            cin >> n3;

            cout<<"please input fourth number.\n";
            cin >> n4;

            cout<<"please input fifth number.\n";
            cin >> n5;

            cout<<"please input sixth number.\n";
            cin >> n6;

            cout<<"please input seventh number.\n";
            cin >> n7;

            cout<<" please input last number.\n";
            cin >> n8;

            average = n1+n2+n3+n4+n5+n6+n7+n8/amount_of_numbers;

            cout<<"the average mean of this group of numbers is:";
            cout<< average;
            }

            else if (amount_of_numbers >= 8)  {
                cout<<"please input first number.\n";
            cin >> n1;

            cout<<"please input second number.\n";
            cin >> n2;

            cout<<"please input third number.\n";
            cin >> n3;

            cout<<"please input fourth number.\n";
            cin >> n4;

            cout<<"please input fifth number.\n";
            cin >> n5;

            cout<<"please input sixth number.\n";
            cin >> n6;

            cout<<"please input seventh number.\n";
            cin >> n7;

            cout<<"please input eighth number.\n";
            cin >> n8;

            cout<<"please input ninth number.\n";
            cin >> n9;

            average = n1+n2+n3+n4+n5+n6+n7+n8+n9/amount_of_numbers;

            cout<<"the average mean of this group of numbers is:";
            cout<< average;
              }

            else if (amount_of_numbers >= 8)  {
                cout<<"please input first number.\n";
            cin >> n1;

            cout<<"please input second number.\n";
            cin >> n2;

            cout<<"please input third number.\n";
            cin >> n3;

            cout<<"please input fourth number.\n";
            cin >> n4;

            cout<<"please input fifth number.\n";
            cin >> n5;

            cout<<"please input sixth number.\n";
            cin >> n6;

            cout<<"please input seventh number.\n";
            cin >> n7;

            cout<<"please input eighth number.\n";
            cin >> n8;

            cout<<"please input ninth number.\n";
            cin >> n9;

            cout<<"please input thenth number.\n";
            cin >> n10;

            average = n1+n2+n3+n4+n5+n6+n7+n8+n9+n10/amount_of_numbers;

            cout<<"the average mean of this group of numbers is:";
            cout<< average;
                 }
}