( 28 )有如下程序
#include <iostream>
using namespace std;
class Test{
public:
Test(){ }
Test(const Test &t) {cout<<1;}
};
Test fun(Test &u) {Test t=u; return t;}
int main(){Test x,y; x=fun(y); return 0;}
运行这个程序的输出结果是
A )无输出
B ) 1
C ) 11
D ) 111
2下列程序实现对ZIP 文件file.zip 的检索,在横线处填入正确的语句是( )。package test;import java.io.*;import java.util.*; import java.util.zip.*;public class Exam{ public static void main(String[] args){ try{ FileInputStream fis = new FilelnputStream("test/file.zip"); ZipInputStream zis = new ZiplnputStream(fis); ZipEntry en; while ((______ )!= null){ en.getName(); zis.closeEntry(); } zis.close(); } catch(Exception e){ e.pfintStackTrace(); }}
A.en = zis. getNextEntry()
B.en == zis.getNextEntry(
C.en=zis. getEntry()
D.zis.getNextEntry()
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’);
有如下程序: #include using namespace std; Class Test{ public: Test(){} Test(const Test&t){cout<<1;} ); Test fun(Test &u){Test t=u;retum t;} int main(){Test X,y;x=fun(y);retum 0;} 运行这个程序的输出结果是( )。
A.无输出
B.1
C.11
D.111
假设“EXAM.DOC”文件夹存储在“EXAM1”文件夹中,“EXAM1”文件夹存储在“EXAM2”文件夹中,“EXAM2”文件夹存储在F盘的根文件夹中,当前文件夹为“EXAM1”。那么,正确描述“EXAM.DOC”文件的绝对路径表示为(37)。
A.\EXAM1\
B.F:\EXAM2\EXAM1\EXAM.DOC
C.F:\EXAM2\EXAM1
D.F:\EXAM1\EXAM2
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A.public class test { public int x = 0; public test(int x) { this.x = x; } }
B.public class Test{ public int x=0; public Test(int x) { this.x = x; } }
C.public class Test extends T1, T2 { public int x = 0; public Test (int x) { this.x = x; } }
D.public class
考虑函数原型void test(int a,int b=7,char="*"),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,"*")
已知如下的命令执行java My Test abc,( )语句是正确的。
A.args[0]="My Test abc"
B.args[0]="My Test"
C.args[0]="a"
D.args[0]="abc"
下列代码中,将引起一个编译错误的行是 1) public class Test{ 2) int m,n; 3) public Test(){} 4) public Test(inta){m=a;} 5) public static void main(String args[]){ 6) Test t1,t2; 7) int j,k; 8) j=0;k=0; 9) t1=new Test(); 10) t2=new Test(j,k); 11) } 12) }
A.第3行
B.第5行
C.第6行
D.第10行
在下列源代码文件Test.java中,正确定义类的代码是( )。
A.pblic class test { public int x=0; public test(int x) { this. x=x;} }
B.public class Test { public int x=0; public Test(int x) { this. x=x;} }
C.public class Test extends T1,T2{ public int x = 0; public Test(int x){ this. x = x; } }
D.protected class Test extends T2{ public int x = 0; public Test(int x) { this. x = x; } }