【单选题】在窗体 Form1 上画一个名称为 Command1 的命令按钮,编写如下程序代码: Private Type stu sn As String * 20 class As String * 20 End Type Private Sub Command1_Click() Dim s As stu Open "c:allstu.dat" For Random As #1 Len = Len(s) ...
【单选题】有以下程序源代码public class TestException{ public static double calculateArea(double a, double b, double c) { double p = (a+b+c)/2; return Math.sqrt(p*(p-a)*(p-b)*(p-c)); } public static void main(String[] a...
【单选题】如果有以下的程序代码: public interface Some { publicvoid doSome(); } public class SomeImpl implementsSome{ publicvoid doSome(){ System.out.println(" 做一些事 "); } } public class Test{ public static void main(Strin...
【单选题】有以下程序源代码public class TestException{ public static double calculateArea(double a, double b, double c) { double p = (a+b+c)/2; return Math.sqrt(p*(p-a)*(p-b)*(p-c)); } public static void main(String[] a...
【单选题】在窗体 Form1 上画一个名称为 Command1 的命令按钮,编写如下程序代码: Private Type stu sn As String * 20 class As String * 20 End Type Private Sub Command1_Click() Dim s As stu Open "c:allstu.dat" For Random As #1 Len = Len(s) ...