#include <iostream>
using namespace std;
 /***********************************
 Joseph Cognata
 2/14/17
 This program will tell lowest and highest
 tempature needed for a oven with a broken
 pad that can not use 1, 4, 7.
 EX.
 Users temp: 430
 Lowest: 399
 Highest: 500
 ***********************************/
int main(){
    int num1, num2, num3;
    char playAgain;

    do{
        cout << "The oven has broken and three digits don't work(1,4,7)." << endl;
        cout << "The user(you) will give an input of what tempature you need for cooking(Between 0-999)." << endl;
        cout << "This program will output a new number that is the best suited, if needed, to use." << endl;
        cout << "The tempature you will be cooking at(please press enter after each number): " << endl;
        cin >> num1 >> num2 >> num3;

        //validate they entered a number between 0 and 999
        while(num1 > 9 || num1 < 0 || num2 > 9 || num2 < 0 || num3 > 9 || num3 < 0){
            cout << "Error.... to try again please enter Y or N: " << endl;
            cin >> playAgain;
			if(playAgain == 'Y' || playAgain == 'y'){
				cout << "The oven has broken and three digits don't work(1,4,7)." << endl;
				cout << "The user(you) will give an input of what tempature you need for cooking(Between 0-999)." << endl;
				cout << "This program will output a new number that is the best suited, if needed, to use." << endl;
				cout << "The tempature you will be cooking at(please press enter after each number): " << endl;
				cin >> num1 >> num2 >> num3;
			}else{
				return 0;
			}
        }

        if ((num1 != 1 && num1 != 4 && num1 != 7) && (num2 != 1 && num2 != 4 && num2 != 7) && (num3 != 1 && num3 != 4 && num3 != 7)){
            cout << "The best tempature to use: " << num1 << num2 << num3 << endl;
        }else{
            if (num1 == 1 || num1 == 4 || num1 == 7){
                num1 - 1;
                num2 - 1;
                cout << "Lowest tempature to use: " << num1 - 1 << "99 \n";
                cout << "Highest tempature to use: " << num1 + 1 << "00\n";
            }
            else if (num2 == 1 || num2 == 4 || num2 == 7){
                cout << "Lowest tempature needed: " << num1 << num2 - 1 << "9\n";
                cout << "Highest tempature to use: " << num1 << num2 + 1 << "0\n";
            }
            else if (num3 == 1 || num3 == 4 || num3 == 7){
                cout << "Lowest tempature needed: " << num1 << num2 << num3 - 1 << endl;
                cout << "Highest tempature to use: "
                    << num1 << num2 << num3 + 1 << endl;
            }
            else{
                cout << "Error.... to try again please enter Y or N: ";
                cin >> playAgain;
            }
        }

        cout << "To do again please enter Y or N: "; //<< endl;
        cin >> playAgain;

   }while(playAgain == 'Y' || playAgain == 'y');
    return 0;
}