// I need this library
import java.io.*;

// class that knows weird (but helpful) incantations
class CIS214 {


	// method to read input from a user
	// input is returned as a string
	public static String getInput(String prompt) {
		String user = null;
		// input is dangerous
		try {
			System.out.print(prompt+" > ");
			BufferedReader in = 
                    new BufferedReader(
                    new InputStreamReader(System.in));
			// actual read is here
			user = in.readLine();
		} catch (IOException e) {
			System.out.println("IOException " + e);
		}
		return user;
	}

	// method to get a number from a user
    // keeps asking until valid int given
	public static int getIntInput(String prompt) {
        // keep asking forever, return value ends loop
        while (true) {
            // in case the user is stupid
            try {
                int p = Integer.parseInt(getInput(prompt));
                return p; // loop ends
            } catch (Exception e) {
                System.out.println("Input invalid.  Try again.");
            }
        }
	}


	// method to get a number from a user
    // keeps asking until valid int given
	public static double getDoubleInput(String prompt) {
        // keep asking forever, return value ends loop
        while (true) {
            // in case the user is stupid
            try {
                double p = Double.parseDouble(getInput(prompt));
                return p; // loop ends
            } catch (Exception e) {
                    System.out.println("Input invalid.  Try again.");
            }
        }
	}
    
    // testing 
    public static void main(String [] args) {
        String s = getInput("request a string");
        double d = getDoubleInput("request a double");
        int i = getIntInput("request an int");
        
        System.out.println("s = " + s);
        System.out.println("d = " + d);
        System.out.println("i = " + i);
    }


}