Compilation will fail.
Compilation succeeds and no exceptions are thrown.
Compilation succeeds but an exception is thrown at line 5 in ClassTest.java.
Compilation succeeds but an exception is thrown at line 6 in ClassTest.java.
第1题:
有如下程序: #include<iostream> using namespqce Std; class TestClass { private; Char C; public; TestClass(char n):c(n){} ~TestClass() { cout<<c; }; class TestClassl:public TestClass { private: Char C; public:
A.xy
B.yx
C.x
D.y
第2题:
有以下程序 #include<iostream> #include<string> using namespace std; class base { private: charbaseName[10]; public: base() { strcpy(baseName,"Base"); } virtual char*myName() return baseName; } char *className() { return baseName; } }; class Derived: public base { private: char derivedName[10]; public: Derived() { strcpy(derivedName,"Derived"); } char *myName() { return derivedName; } char *className() { return derivedName; } }; void showPtr(base &p) { cout<<p.myName0<<" "<<p.className(); } int main() { base bb; Derived dd; showPtr(dD) ; retum 0; } 动行后的输出结果为
A.Derived Base
B.Base Base
C.Derived Derived
D.Base Derived
第3题:
( 13 )有如下程序:
#include <iostream>
using namespace std;
class GrandChild{
public:
GrandChild(){ strcpy (name,"Unknown"); }
const char * getName()const { return name; }
virtual char * getAddress()const=0;
private:
char name[20];
};
class GrandSon : public GrandChild{
public:
GrandSon{char *name} {}
Char * getAddress() const { return "Shanghai";}
};
int main(){
GrandChild *gs=new GrandSon("Feifei");
cout<<gs->getName()<<" 住在 "<<gs->getAddress()<<endl;
delete gs;
return 0;
}
运行时的输出结果是 【 13 】 。
第4题:
下列程序段中,正确的是______。 ①class MvClass { int var = 100; static int getVar() { return var; } } ②public class MyClass { final int date; void MyClass (int d) { date = d; } } ③public class MyMain { public static void main(String args[]) { System.out.println(Myclass1.date); } } class MyClass1 { int data = 10; } ④class IamAbstract { final int f; double d; abstrct void method(); }
A.②④
B.①③
C.②
D.以上都不对
第5题:
有以下程序 #include <iostream> #include <string> using namespace std; class base { private: char baseName[10]; public: base () { strcpy(baseName,"Base"); } virtual char *myName() { return baseName; } char *className() { return baseName; } }; class Derived : public base { private: char derivedName[10]; public: Derived() { strcpy(derivedName,"Derived"); } char *myName() { return derivedName; } char *className() { return derivedName; } }; void showPtr(base &p) { cout<<p.myName () <<" "<<p.className (); } int main () { base bb; Derived dd; showPtr(dd); return 0; } 运行后的输出结果为
A.Derived Base
B.Base Base
C.Derived Derived
D.Base Derived
第6题:
下列哪个选项的java源文件代码片段是不正确的?
A.package testpackage; public class Test{ }
B.import java. io. *; package testpaekage; public class Test { }
C.import java.io.*; class Person { } public class Test { }
D.import java.io.*; import java. awt.*; public class Test{ }
第7题:
有如下程序: #include<iostream> using namespace std; class TestClass { private; char c; public; TestClass (char n):c(n){} ~TestClass () { cout<<c; } }; class TestClass1:public TestClass { Private: char c; public: TestClass1(char n):TestClass (n+1),c(n){} ~TestClass1() { cout<<c; } }; int main() { TestClass1 obj('x'); return 0; } 执行上面的程序输出( )。
A.xy
B.yx
C.x
D.y
第8题:
下列Java源程序结构中前三种语句的次序,正确的是
A.import, package, public class
B.import必为首,其他不限
C.public class, import, package
D.package, import, public class
第9题:
有以下程序 #inclube <iostream.h> class ClassOne { public: ClassOne(int v=O) { i=v;cout<<i;} void print(){ cout<<i<<end1;} }; class ClassTwo { public: ClassTwo(int v=O) { i=v;cout<<i;} void print(){ cout<<i<<end1;} private: ClassOne myObj; int i; }; void main() { ClassTwo obj(1); obj.print(); }
A.11
B.111
C.110
D.101
第10题:
有以下程序: #include <iostream> using namespace std; class BASE { private: char c; public: BASE(char n):c(n);{} virtual~BASE() { cout<<c; } }; class DERIVED:public BASE { char c; p
A.XY
B.YX
C.X
D.Y