说出下面几个函数的区别:

private void test(string str){…}

private void test(ref string str){…}

private void test(out string str){…}

如果一个页面与数据

[单选题]写出下面程序的输出( )。 public class Test { public static void main (String args[ ]) { iht x=1, y=2; System. out. println ("result="+x+y); System. out. println ("result="+(x+y));A．result=12 result=12B．result=3 result=3C．result=3 result=12D．result=12 result

[主观题]分析以下代码。public static void test(string ConnectString){System.Data.OleDb.OleDbConnection conn = new System.Data.OleDb.OleDbConnection();conn.ConnectionString = ConnectString;try{conn.Open();…….}catch(Exception Ex){MessageBox.Show(Ex.ToString());}finall

[主观题]分析以下代码。public static void test(string ConnectString){System.Data.OleDb.OleDbConnection conn = new System.Data.OleDb.OleDbConnection();conn.ConnectionString = ConnectString;try{conn.Open();…….}catch(Exception Ex){MessageBox.Show(Ex.ToString());}finall

[单选题]下面函数的作用是以双倍行距输出文件:void test(ifstream&outf,ofstream&outC) {char c;while(______){______;if(c=='/n')outc.put(C) ;}}下划线处缺失的代码是( )。A．outf.put(C) 与outc.get(C)B．outf.put(C) 与outc.get(C)C．outf.get(C) 与outc.put?D．outf.get(C) 与outc.put?

[主观题]void test(void)

[单选题]阅读下面程序 public void test() { try{ sayHello()； System.out.println("hello")； } catch(ArrayIndexOutOfBoundException e) { System.out.println("ArrayIndexOutOfBoundException")； } catch(Exception e) { System.out.println("Exception"); } finally { System

[单选题]下列程序的运行结果是public class test{private String[] data={“10”,“10.5”};public void fun(){double s=0;for(int i=0;i<3;i++){try{s=s+Integer .parseInt(data[i])；}catch(Exception e){System.out.print(“errorl:”+data[i])；}}}public static void main(String[]args){t

[单选题]下列程序的运行结果是public class test{private String[] data={“10”,“10.5”};public void fun(){double s=0;for(int i=0;i<3;i++){try{s=s+Integer .parseInt(data[i])；}catch(Exception e){System.out.print(“errorl:”+data[i])；}}}public static void main(String[]args){t

[单选题]考虑函数原型void test(int a，int b=7，char z=‘*’)，下面的函数调用中，属于不合法调用的是( )。A．test(5)；B．test(5，8)；C．test(6，’#’)；D．test(0，0，’x’)；

[单选题]阅读下面代码 public class Test { String s="One World One Dream"； public static void main(String[] args) { System.out.println(s)； } } 其运行的结果是A．argsB．World One DreamC．sD．编译时出错