What happens when you attempt to compile and run the following code?
#include <iostream>
using namespace std;
#define DEF_A 0
int main(int argc, char *argv[]) {
cout << DEF_A;
return 0;
}

What happens when you attempt to compile and run the following code?
#include <iostream>
#include <string>
using namespace std;
class B;
class A {
int age;
public:
A () { age=5; };
friend class B;
};
class B {
string name;
public:
B () { name="Bob"; };
void Print(A ob) {
cout << name << ob.age;
}
};
int main () {
A a;
B b;
b.Print(a);
return 0;
}

What happens when you attempt to compile and run the following code?
#include <iostream>
#include <cstdarg>
using namespace std;
int mult(int f, int s, int t);
int main()
{
cout << mult(1,2,3);
return 0;
}
int mult(int f, int s, int t)
{
int mult_res;
mult_res = f*s*t;
return mult_res;
}

What happens when you attempt to compile and run the following code?
#include <iostream>
using namespace std;
class First
{
public:
void Print(){ cout<<"from First";}
};
class Second
{
public:
void Print(){ cout<< "from Second";}
};
int main()
{
Second t[2];
for (int i=0; i<2; i++)
t[i].Print();
}

What is the output of the program?
#include <iostream>
#include <string>
using namespace std;
int main () {
string s1 = "Hello", s2 = "World";
s2 = s1 + s2;
cout << s2;
return 0;
}