quiz4_2.java

程序练习中包括书中实例程序代码和练习中要用到的代码,是压缩文件

public class Quiz4_2 {
   private static final double A = 5.6;
   private double b;
   Quiz4_2( double z1, double  z2 ) {
      b = z1 * z2;
   }
   Quiz4_2( double z ) {
      if ( z > 0.0 ) {
         this( z, 2.0 );
      } else {
         this( z, 1.0 );
      }
   }
   public static void main ( String[] args ) {
      System.out.println( new Quiz4_2 ( 4.0, 3.0 ) );
   }
   public String toString() {
      return( "b = " + b );
   }
}