有以下程序: Class Date { public: Date(int y,int m,mt d); { year=y; month=m; day=d; } Date(int y=2000) { year=y; month=10; day=1; } Date(Date &D) { year=d.year; month=d.month; day=d.day; } Void prin
A.2
B.3
C.4
D.5
A.2
B.3
C.4
D.5
有以下类定义 clas sMyClass { public: My Class() { cout<<1;} }; 则执行语句MyClassa,b[2],*p[2];后,程序的输出结果是
A.11
B.111
C.1111
D.11111
有以下程序: #include<iostream> using namespace std; #definePl 3.14 Class Point {private: int x,y; public: Point(int a,intB) {X=a; y:b;} int getx() <return x;} int gety() {return y;}}; class Circle:public Point {pri
A.314
B.157
C.78.5
D.153.86
有以下程序 #include<iostream> using namespace std; class Complex { public: Complex(double r=O,double i=0):re(r),im(i){} double real() const {return re;} double imag()const {return im;} Complex operator +(Complex C) const {return Complex (re+c.re,im+c.im);} private: double re,im; }; int main() { Complex a=Complex(1,1)+Complex (5); cout<<a.real()<<'+'<<a.imag()<<'i'<<endl; retum 0; } 程序执行后的输出结果是
A.6+6i
B.6+1i
C.1+6i
D.1+1i
有以下程序: #include<iostream> using namespace std; class MyClass { public: MyClass(); ~MyClass(); void SetValue(int val); private: static int i; }; int MyClass::i=0; MyClass::MyClass() { i++; cout<<i; } MyClass::~MyClass() { i--; cout<<i; } void MyClass::SetValue(int val) { i=val; } int main() { MyClass*my[2]; int k; for(k=0;k<2;k++) my[k]=new MyClass; for(k=0;k<2;k++) delete my[k]; return 0; } 运行后的输出结果是()。
A.1210
B.1100
C.1234
D.输出结果不确定
A.protected int ConstOver (){ }
B.private ConstOver (int z, int y, byte x) { }
C.public object ConstOver (int x, int y, int z) { }
D.public void ConstOver (byte x, byte y, byte z) { }
A. 222
B. 233
C. 223
D. 345
以下程序中,错误的行为 ①#include < iostream.h > ②class A ③{ ④ public: ⑤ int n=2; ⑥ A(int val){cout << val<<end1;} ⑦ ~A(0{}; ⑧}; ⑨void main(0 ⑩{ (11) Aa(0); (12)
A.⑤
B.⑥
C.⑦
D.(11)
A.-1
B.Exception
C.1
D.0
A.⑤
B.⑥
C.⑦
D.⑩
A.i=20
B.程序有编译错误
C.i=10
D.i=true
A.CBA
B.BAC
C.ACB
D.ABC