A.2次
B.3次
C.4次
D.5次
[单选题]有如下类定义: class Point { int x_,y_; public: Point():x_(0),y_(0){} Point(int x,int y=0):x_(x),y_(y){} }; 若执行语句 Point a(2),b[3],*c[4]; 则Point类的构造函数被调用的次数是A.2次B.3次C.4次D.5次
[单选题]有如下类定义:class Point{int x_, y_;public:Point():x_(0), y_(0){}Point(int x, int y = 0):x_(x),y_(y){}};若执行语句Point a(2), b[3] , *c[4];则 Point 类的构造函数被调用的次数是A. . 2 次B. . 3 次C. . 4 次D. . 5 次
[单选题]有如下类定义: class Point{ int x_,y_; public: Point( ):x_(0),y_(0){} Point(int x,int y=0):x_(x),y_(y){} }; 若执行语句: Point a(2),b[3],*c[4]; 则Point类的构造函数被调用的次数是A.2次B.3次C.4次D.5次
[单选题]有如下类定义:class Test{public:Test(){ a = 0; c = 0;} // ①int f(int a)const{this->a = a;} // ②static int g(){return a;} // ③void h(intB. . {Test::b = b;}; // ④private:int a;static int b;const int c;};int Test::b = 0;在标注号码的行中,能被正确编译的是A. . ①B. . ②C. . ③D.
[单选题]有如下类定义: class Test { public: Test(){a=0;c=0;} //① int f(int a)const {this->a=a;} //② static int g(){return a;} //③ void h(int b){Test::b=b;}; //④ private: int a; static int b; const int c; }; int Test::b=0; 在标注号码的行中,能被正确编译的是A.①B.②C.③D.④
[单选题]有如下类说明: class TestClass{ int x; public: TestClass(int n){x=n;} }; class TestClass1:public TestClass{ int y; public: TestClass1(int a,int b); }; 在构造函数TestClass1的下列定义中,正确的是( )。A.TestClass1::TestClass1 (int a,int b):x(a),y(b){}B.TestClass1::TestClass1 (
[单选题]有如下类定义: class Test { public: Test(){a=0;C=0;t //① int f(int A) const{this->a=a;} //② static int g( ){return a;} //③ void h(int B) {Test::b=b;}; //④ private: int a; static int b; const int c; }; int Test::b=0: 在标注号码的行中,能被正确编译的是A.①B.②C.③D.④
[单选题]有如下程序 public class Test { int a,b; Test ( ) { a = 100; b = 200; } Test(int x, int y) { a = x; b = y; } public static void main(String args[]) { Test Obj1 = new Test(12,45); System.out.println("a = "Obj1.a+" b = "+ObB) ; Test Obj1 = new Test(); Sy
[单选题]有如下类定义: class Test { public: Test(){a=0;c=0} //① int f(int a)const{this->a=a;} //② static int g(){return a;} //③ void h(int b){Test::b;}; //④ private: int a; static int b; const int C; }; int Test::b=0; 在标注号码的行中,能被正确编译的是( )。A.①B.②C.③D.④
[单选题]有如下类定义: class Test { private int x; public int y; public void setX (int m) {x=m;} public int getX( ) {return x;} }现用Test t=new Text();生成一个对象t,则如下语句中,错误的是( )。A.t.x=10;B.t.y=10;C.t. setX(10);D.int m=t.getX( );