#include <iostream>
using namespace std;

enum denominations {
    five = 0;
    ten = 0;
    twenty = 0;
    fifty = 0;
}

int main {
    int changeInput;
    changeInput = getInput();
}

int getInput(){
    int input;

    while( 1 ){ // Infinite while, loops until it gets a valid input
        cout << "Enter change: ";
        cin >> input;

        if( !(change % 5) && change >= 5 && change <= 95 ){ // If modulus returns 0 and variable is 5-95
            return input; // returns valid input and exits getInput function
        } else {
            cout << "invalid input, enter a number between 0-95 in multiples of 5"; // that's not it, chief. Loops to beginning of while()
        }

    }

}