俞成章

1. public class CH01 {
   
2. 
   
3.         public static void main(String[] args) {
   
4.         double a=3.456789;
   
5.         double b=34.56789;
   
6.         double c=345.6789;
   
7.         double d=3456.789;
   
8.        
   
9.         System.out.printf("%.1f%n",c);
   
10.         System.out.printf("%.0f%n",d);
    
11.         System.out.printf("%9.2f%n",a);
    
12.         System.out.printf("%9.2f%n",b);
    
13.         System.out.printf("%09.2f%n",c);
    
14.         System.out.printf("%09.2f%n",d);
    
15. 
    
16.         }
    
17. 
    
18. }

複製代碼