complete2_3.java

北京大学出版社的

package questions.c2;

public class Complete2_3 {
   public static void main( String[] args ) {
      // convert the first argument to a float and
      // write its absolute value to System.out
      if ( args.length >= 1 ) {
         // your code here
      } else {
         System.out.println( "Please provide a number." );
      }
   }
}