Prime or Composite for

#include <iostream>
using namespace std;
int main(){
    int num2, two_numbers, input;
    cout << "Enter a Number: ";
    cin >> input;
    for (input; num2<=input;){
        //Reset to 0
        two_numbers=0;
        for (num2=1; num2<=input; num2++){
            if (input%num2==0){
                two_numbers++;
            }
        }
        if (two_numbers==2){
            cout << input << " is a prime number . . .";
        }
        else if (two_numbers!=2 && two_numbers!=0){
            cout << input << " is a composite number . . .";
        }
        else if (two_numbers==0){
            cout << input << " is neither a prime number nor a composite number . . .";
        }
    }
}