CONTROL STRUCTURES I: SELECTION - Java Programming: From Problem Analysis to Program Design - page 241

26. Write the missing statements in the following program so that it prompts
the user to input two numbers. If one of the numbers is 0 , the program
should output a message indicating that both numbers must be nonzero. If
the first number is greater than the second number, it outputs the first
number divided by the second number; if the first number is less than the
second number, it outputs the second number divided by the first number;
otherwise, it outputs the product of the numbers. Format your output to
two decimal places.
import java.util.*;

4

public class Exercise26
{

static Scanner console = new Scanner(System.in);

public static void main(String[] args)
{

double firstNum, secondNum;

System.out.print("Enter two nonzero numbers: ");
firstNum = console.nextDouble();
secondNum = console.nextDouble();
System.out.println();

//Missing statements

}

}

PROGRAMMING EXERCISES

1. Write a program that prompts the user to input a number. The program
should then output the number and a message saying whether the number is
positive, negative, or zero.
2. Write a program that prompts the user to input three numbers. The
program should then output the numbers in nondescending order.
3. Write a program that prompts the user to input an integer between 0 and
35 . If the number is less than or equal to 9 , the program should output the
number; otherwise, it should output A for 10 , B for 11 , C for 12 , . . ., and Z
for 35 .(Hint: Use the cast operator, ( char) ( ), for numbers >= 10 .)
4. The statements in the following program are in incorrect order. Rearrange the
statements so that it prompts the user to input the shape type ( rectangle ,
circle ,or cylinder ), and the appropriate dimension of the shape. The
program then outputs the following information about the shape: For a
rectangle, it outputs the area and perimeter; for a circle, it outputs the
area and circumference; and for a cylinder, it outputs the volume and surface
area. After rearranging the statements, your program should be properly
indented.