public class reprompt {
    
    // Prompt the user to enter an integer between $min$ and $max$:
    private static int promptForInt(int min, int max) {
	
	// Prompt for the user:
	String prompt = "Enter a value between "+min+" and "+max+": ";

	// Get initial input:
	System.out.print(prompt);
	int userValue = SavitchIn.readInt();
	
	// Ensure the that input is legal:
	while(userValue < min || userValue > max) {
	    
	    // Explain why the input is illegal:
	    if (userValue < min) 
		System.out.println("Too low!");
	    else if (userValue > max)
		System.out.println("Too high!");
	    else {
		System.out.println("Something went horribly wrong!");
		System.exit(0);
	    }
	    
	    // Prompt the user again and test next input:
	    System.out.print(prompt);
	    userValue = SavitchIn.readInt();
	}
	
	// Now the input is OK, so return it:
	return userValue;

    } // method promptForInt
    
    // Run some test cases:
    public static void main(String[] args) {
	
	System.out.println("Test 1:");
	int x = promptForInt(0,10);
	System.out.println("Congratulations! You entered " + x + ".");

	System.out.println("Test 2:");
	int low = 0, high = 10;
	System.out.println("Congratulations! You entered " +
			   promptForInt(low,high) + ".");

	
    } // method main

} // class reprompt