Which code, inserted at line 8, generates the output "0102020"?
#include
using namespace std;
class Base {
static int age;
public:
Base () {};
~Base () {};
//insert code here
void Print() { cout << age;}
};
int Base::age=0;
int main () {
Base a,*b;
b = new Base();
a.Print();
a.setAge(10);
a.Print();
b?>setAge();
a.Print();
b?>Print();
return 0;
}
What happens when you attempt to compile and run the following code?
#include
#include
using namespace std;
class A {
public:
A() { cout << "A no parameters";}
A(string s) { cout << "A string parameter";}
A(A &a) { cout << "A object A parameter";}
};
class B : public A {
public:
B() { cout << "B no parameters";}
B(string s) { cout << "B string parameter";}
};
int main () {
A a2("Test");
B b1("Alan");
B b2(b1);
return 0;
}
What happens when you attempt to compile and run the following code?
#include
using namespace std;
class BaseClass
{
public:
int *ptr;
BaseClass(int i) { ptr = new int(i); }
~BaseClass() { delete ptr; delete ptr;}
void Print() { cout << *ptr; }
};
void fun(BaseClass x);
int main()
{
BaseClass o(10);
fun(o);
o.Print();
}
void fun(BaseClass x) {
cout << "Hello:";
}
Which of the structures is incorrect?
1:
struct s1{
int x;
long int li;
};
2:
struct s2{
float f;
struct s2 *s;
};
3:
struct s3{
float f;
struct s3 s;
};