import java.io.*; 

  public class UserInput { 

     public static int getInt () { 
       
	int intInput = 0;
	String userInput = null;

        //  open up standard input 
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); 

        //  read the data from the command-line; need to use try/catch with the 
        //  readLine() method 
        try { 
           userInput = br.readLine(); 
        } catch (IOException ioe) { 
           System.out.println("IO error trying to read input!"); 
           System.exit(1); 
        }
	// convert user input to an integer
	try {
	   intInput = Integer.parseInt(userInput);
	} catch (NumberFormatException nfe) {
           System.out.println("Error: Input provided is not a valid Integer!"); 
           System.exit(1); 
        }
	return intInput;

     }

     public static int getInt (String message) { 
       
	int intInput = 0;
	String userInput = null;
        //  prompt the user to enter data 
        System.out.print(message + " "); 

        //  open up standard input 
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); 

        //  read the data from the command-line; need to use try/catch with the 
        //  readLine() method 
        try { 
           userInput = br.readLine(); 
        } catch (IOException ioe) { 
           System.out.println("IO error trying to read input!"); 
           System.exit(1); 
        }
	// convert user input to an integer
	try {
	   intInput = Integer.parseInt(userInput);
	} catch (NumberFormatException nfe) {
           System.out.println("Error: Input provided is not a valid Integer!"); 
           System.exit(1); 
        }
	return intInput;

     }



     public static double getDouble () { 
       
	double doubleInput = 0;
	String userInput = null;

        //  open up standard input 
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); 

        //  read the data from the command-line; need to use try/catch with the 
        //  readLine() method 
        try { 
           userInput = br.readLine(); 
        } catch (IOException ioe) { 
           System.out.println("IO error trying to read input!"); 
           System.exit(1); 
        }
	// convert user input to a double
	try {
	   doubleInput = Double.parseDouble(userInput);
	} catch (NumberFormatException nfe) {
           System.out.println("Error: Input provided is not a valid Double!"); 
           System.exit(1); 
        }
	return doubleInput;

     } 

     public static double getDouble (String message) { 
       
	double doubleInput = 0;
	String userInput = null;
        //  prompt the user to enter data 
        System.out.print(message + " "); 

        //  open up standard input 
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); 

        //  read the data from the command-line; need to use try/catch with the 
        //  readLine() method 
        try { 
           userInput = br.readLine(); 
        } catch (IOException ioe) { 
           System.out.println("IO error trying to read input!"); 
           System.exit(1); 
        }
	// convert user input to a double
	try {
	   doubleInput = Double.parseDouble(userInput);
	} catch (NumberFormatException nfe) {
           System.out.println("Error: Input provided is not a valid Double!"); 
           System.exit(1); 
        }
	return doubleInput;

     } 



     public static String getString () { 
       
	String userInput = null;

        //  open up standard input 
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); 

        //  read the data from the command-line; need to use try/catch with the 
        //  readLine() method 
        try { 
           userInput = br.readLine(); 
        } catch (IOException ioe) { 
           System.out.println("IO error trying to read input!"); 
           System.exit(1); 
        }
	return userInput;

     } 

     public static String getString (String message) { 
       
	String userInput = null;
        //  prompt the user to enter data 
        System.out.print(message + " "); 

        //  open up standard input 
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); 

        //  read the data from the command-line; need to use try/catch with the 
        //  readLine() method 
        try { 
           userInput = br.readLine(); 
        } catch (IOException ioe) { 
           System.out.println("IO error trying to read input!"); 
           System.exit(1); 
        }
	return userInput;

     } 

  }  // end of UserInput class