Java Reference
In-Depth Information
Display 9.1
Handling a Special Case without Exception Handling
(part 1 of 2)
1
import
java.util.Scanner;
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public
class
DanceLesson
3{
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public
static
void
main(String[] args)
5
{
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Scanner keyboard =
new
Scanner(System.in);
7
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System.out.println("Enter number of male dancers:");
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int
men = keyboard.nextInt();
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System.out.println("Enter number of female dancers:");
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int
women = keyboard.nextInt();
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if
(men == 0 && women == 0)
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{
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System.out.println("Lesson is canceled. No students.");
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System.exit(0);
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}
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else
if
(men == 0)
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{
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System.out.println("Lesson is canceled. No men.");
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System.exit(0);
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}
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else
if
(women == 0)
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{
24
System.out.println("Lesson is canceled. No women.");
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System.exit(0);
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}
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// women >= 0 && men >= 0
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if
(women >= men)
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System.out.println("Each man must dance with " +
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women/(
double
)men + " women.");
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else
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System.out.println("Each woman must dance with " +
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men/(
double
)women + " men.");
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System.out.println("Begin the lesson.");
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}
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}
