【单选题】有如下程序: #include<iostream> using namespace std classA { public: A(){cout<<'A'} } class B{public:B(){cout<<'B'}} class C:public A { B b public: C(){cout<<'C'} } int main(){C objreturn 0} 执行后的输出结果是( )
【单选题】在下列源代码文件Test.java中,哪个选项是正确的类定义?
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.
protected class Test extends T2 { public int x=0; public Test(int x) { this.x=x; } }
【单选题】Given the following code: 1)class Person { 2) public void printValue(int i, int j) {/*…*/ } 3) public void printValue(int i) {/*…*/ 4) } 5) public class Teacher extends Person { 6) public void pri...
【单选题】根据下列哪一项试验可以判定白喉棒状杆菌是否产生毒素( )。
【单选题】下列虚基类的声明中正确的是
A.
class virtual B:public A
B.
virtual class B:public A
C.
class B:public A virmal
D.
class B:virmal public A