Practice C++ Institute CPA-21-02 Exam Questions

What will the variable "age" be in class B? class A { int x; protected: int y; public: int age; A () { age=5; }; }; class B : public A { string name; public: B () { name="Bob"; }; void Print() { cout << name << age; } };

What happens when you attempt to compile and run the following code? #include <iostream> #include <string> using namespace std; class complex{ double re, im; public: complex() : re(1),im(0.4) {} complex operator?(complex &t); void Print() { cout << re << " " << im; } }; complex complex::operator? (complex &t){ complex temp; temp.re = this?>re ? t.re; temp.im = this?>im ? t.im; return temp; } int main(){ complex c1,c2,c3; c3 = c1 ? c2; c3.Print(); }

What happens when you attempt to compile and run the following code? #include <iostream> using namespace std; class complex{ double re; double im; public: complex() : re(0),im(0) {} complex(double x) { re=x,im=x;}; complex(double x,double y) { re=x,im=y;} void print() { cout << re << " " << im;} }; int main(){ complex c1; c1 = 3.0; c1.print(); return 0; }

What happens when you attempt to compile and run the following code? #include <iostream> using namespace std; void fun(int); int main() { int a=0; fun(a); return 0; } void fun(int n) { if(n < 2) { fun(++n); cout << n; } }

What happens when you attempt to compile and run the following code? #include <iostream> using namespace std; int s(int n); int main() { int a; a = 3; cout << s(a); return 0; } int s(int n) { if(n == 0) return 1; return s(n?1)*n; }