RocketLaunchApp

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace RocketLaunchApp {
    class Program {
        static void Main(string[] args) {
            int Temperature = 0;
            string GoOrNot = "n";
            string Sky = "p";
            //State 1: Enter temp
            bool valid = false;
            while (!valid) {
                Console.Write("Enter temperature: ");
                valid = Int32.TryParse(Console.ReadLine(), out Temperature)
                    && Temperature > 0;
            }
            //State 2: Enter System Status
            valid = false;
            while (!valid) {
                Console.Write("All system go (Y/N): ");
                GoOrNot = Console.ReadLine().ToLower();
                if (GoOrNot == "y" || GoOrNot == "n") {
                    valid = true;
                }
            }
            //State 3: Enter Sky Status
            valid = false;
            while (!valid) {
                Console.Write("Sky confirm (P,C,R,T): ");
                Sky = Console.ReadLine().ToLower();
                if (Sky == "p" || Sky == "c" || Sky == "r" || Sky == "t") {
                    valid = true;
                }
            }

            //Summarize up
            bool canLaunch = true;
            if(Temperature > 90 || Temperature < 60) {
                canLaunch = false;
            }
            if(GoOrNot == "n") {
                canLaunch = false;
            }
            if (Sky == "r" || Sky == "t") {
                canLaunch = false;
            }
            if (canLaunch) {
                Console.WriteLine("Launch Now!!");
            } else {
                Console.WriteLine("Do Not Launch!!");
            }
            Console.ReadLine();
        }
    }
}