Programmieren in Java

Programmieren in Java
3) Der Quelltext zur Programmlösung ist dann:
public class FloatDemo
{
public static void main(String args[])
{
// Konvertieren
float x = Float.valueOf(args[0]).floatValue();
float y = Float.valueOf(args[1]).floatValue();
// Ausgabe der ueber die Befehlszeile eingegebenen Zahlen
System.out.println("x = " + x);
System.out.println("y = " + y);
// Binaere Arithmetik mit den Operatoren + - * /
float z;
z = x + y;
System.out.println("z = x + y = " + z);
z = x - y;
System.out.println("z = x - y = " + z);
z = x * y;
System.out.println("z = x * y = " + z);
z = x / y;
System.out.println("z = x / y = " + z);
// Unaere Arithmetik mit Inkrement- / Dekrementoperator
x++;
System.out.println("Nach x++: x = " + x);
y--;
System.out.println("Nach y--: y = " + y);
z = x++;
System.out.println("Nach z = x++: z = " + z + ", x = " + x);
z = ++x;
System.out.println("Nach z = ++x: z = " + z + ", x = " + x);
System.out.println("x = " + x);
System.out.println("y = " + y);
z = ++x + y--;
System.out.println("nach z = ++x + y--: z = " + z + ", x = "
+ x + " y = " + y);
System.out.println("x = " + x);
System.out.println("y = " + y);
z = x + y * ++y;
System.out.println("nach z = x + y * ++y: z = " + z + ", x = "
+ x + " y = " + y);
z = (float) (1.0f / 0.0f);
System.out.println("z = (float) (1.0f / 0.0f) = " + z);
}
}
4) Der Aufruf java FloatDemo 17 4 führt dann zu folgenden Ausgabe:
x = 17.0
x = 4.0
z = x + y = 21.0
z = x - y = 13.0
z = x * y = 68.0
z = x / y = 4.25
Nach x++: x = 10.0
Nach y--: y = 3.0
Nach z = x++: z = 18.0, x = 19.0
Nach z = ++x: x = 20.0, x = 20.0
x = 20.0
y = 3.0
Nach z = ++x + y--: z = 23.0, x = 21.0 y = 2.0
x = 21.0
y = 2.0
Nach z = x + y * ++y: z = 27.0, x = 21.0 y = 3.0
z = (float) (1.0f / 0.0f) = Infinity
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