有以下程序:includeusing namespace std;class TestClass{public:TestClass(int n){n 有以下程序: #include<iostream> using namespace std; class TestClass { public: TestClass(int n){number=n;} //拷贝构造函数 TestClass(TestClassother){number=other.number;} ~TestClass(){} private: int number; }; TestClass fun(TestClass P) { TestClass temp(p); return temp; } int main() { TestClass obj1(10),obj2(0) ; TestClass obj3(obj 1) ; obj2=fun(obj3) ; return 0: } 程序执行时,TestClass类的构造函数被调用的次数是( )。A.2B.3C.4D.5

有以下程序:includeusing namespace std;class TestClass{public:TestClass(int n){n

有以下程序: #include<iostream> using namespace std; class TestClass { public: TestClass(int n){number=n;} //拷贝构造函数 TestClass(TestClass&other){number=other.number;} ~TestClass(){} private: int number; }; TestClass fun(TestClass P) { TestClass temp(p); return temp; } int main() { TestClass obj1(10),obj2(0) ; TestClass obj3(obj 1) ; obj2=fun(obj3) ; return 0: } 程序执行时,TestClass类的构造函数被调用的次数是( )。

A.2

B.3

C.4

D.5


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有如下程序: include using namespace std; class TestClass{ int k; public: TestCla 有如下程序:include<iostream>using namespace std;class TestClass{int k;public:TestClass(int x=1):k(x){}~TestClass O{cout<<k;}};int main(){TestClass a[]={TestClass(3),TestClass(3),TestClass(3)};TestClass *p=new TestClass[2];delete []p;return ():}这个程序的输出结果是______。

有以下程序,在横线应添加()。includeusing namespace std;class TestClass{public:Tes 有以下程序,在横线应添加( )。 #include<iostream> using namespace std; class TestClass { public: TestClass(int n){number=n;} ______∥拷贝构造函数 ~TestClass(){} private: int number; }: TestClass fun(TestClass P) { TestClass temp(p); return temp; } int main() { TestClass obj1(10), obj2(0); TestClass obj3(obj1); obj2=fun(obj3); return 0; }A.TestClass(TestClass other){number=other.number;}B.TestClass(TestClass other){number=other.number;}C.TestClass(TestClass other){number;)D.TestClass(other){number=other.number;}

有如下程序:includeusing namespqce Std;class TestClass{private;Char C;public;Tes 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.xyB.yxC.xD.y

有下列程序:include using namespace std; class TestClass1 { public: TestClass1(){ 有下列程序:include<iostream>using namespace std;class TestClass1{public:TestClass1(){cout<<"A";}};class TestClass2<public:TestClass2(){cout<<"B";}};class TestClass3:public TestClass1{TestClass2 b;

执行这个程序的输出结果是(); include using namespace std; class TestClass1 { publ 执行这个程序的输出结果是( );include<iostream>using namespace std;class TestClass1{public:void fun1(){cout<<"TestClass1\n";}virtual void fun2(){cout<<"TestClass1\n";}};class TestClass2:public TestClass1{public:void fun1(){cout<<"TestClass2\n";}void fun2(){cout<<"TestClass2\n";}};void f(TestClass1b){b.fun1();b.fun2();}int main(){TestClass2 obj;f(obj);return 0;}

有如下程序:includeusing namespace std;class TestClass{private;char c;public;Tes 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.xyB.yxC.xD.y

有如下程序:includeusing namespace std;class TestClass{public:TestClass (){cou 有如下程序: #include<iostream.h> using namespace std; class TestClass { public: TestClass (){cout<<"default constructor\n";} TestClass(const TestClass x){cont<<"copy constructor\n";} TestClass userCode(TestClass b){TestClass c(b);return c;} int main() { TestClass a,d; cout<<"calling userCode()\n"; d=userCode(a); return 0; } 执行上面程序的过程中,构造函数TestClass()和TestClass(const Testclass&x)被调用的次数分别是( )A. 2次 3次B.3次 2次C.都是2次D.都是3次

执行下列程序的输出结果是______: include using namespace std; class TestClass1 { 执行下列程序的输出结果是______:include<iostream>using namespace std;class TestClass1{public:void fun1(){cout<<"TestClass1\n";}virtual void fun2(){cout<<"TestClass1\n";}};class TestClass2:public TestClass1{public:void fun1(){cout<<"TestClass2\n";}void fun2(){cout<<"TestClass2\n";}};void f(TestClass1b)<b.fun1();b.fun2();}int main(){TestClass2 obj;f(obj);return 0;}

有下列程序:includeusing namespace std;c1ass TestClass{private;char c;public:Tes 有下列程序: #include<iostream> using namespace std; c1ass TestClass { private; char c; public: TestClass(char n):c(n){} ~TeStClass() { cout<<c } }; class TestClass1:public TestClass {A.xyB.yxC.xD.y