What will be the output of the following C++ code?
#include <iostream>
using namespace std;
class Player
{
private:
int id;
static int next_id;
public:
int getID() { return id; }
Player() { id = next_id++; }
};
int Player::next_id = 1;
int main()
{
Player p1;
Player p2;
Player p3;
cout << p1.getID() << ” “;
cout << p2.getID() << ” “;
cout << p3.getID();
return 0;
}
a) 1 2 3
b) 2 2 2
c) 1 3 1
d) 1 1 1
Answer: a
Explanation: In this as next_id is a static variable so and initialized with 1 therefore the id value for 1st objects is 1 and next_id is updated to 2. In this way next_id is assigned to id in each object creation and updated by 1 so in this way value of each Id is updated.
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#include <iostream>
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std::cout << s;
return 0;
}What will be the output of the following C++ code?
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const int x;
x = 10;
printf(“%d”, x);
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#include <iostream>
using namespace std;
class Point
{
int x, y;
public:
Point(int i = 0, int j =0)
{ x = i; y = j; }
int getX() const { return x; }
int getY() {return y;}
};int main()
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const Point t;
cout << t.getX() << ” “;
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ii) Arguments of a function
iii) Static data members
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#include <iostream>
class Test
{
public:
void fun();
};
static void Test::fun()
{
std::cout<<“fun() is static”;
}
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{
Test::fun();
return 0;
}What will be the output of the following C++ code?
#include <iostream>
using namespace std;
class Test
{
private:
static int count;
public:
Test& fun();
};
int Test::count = 0;
Test& Test::fun()
{
Test::count++;
cout << Test::count << ” “;
return *this;
}
int main()
{
Test t;
t.fun().fun().fun().fun();
return 0;
}What will be the output of the following C++ code?
#include <iostream>
using namespace std;
class A
{
private:
int x;
public:
A(int _x) { x = _x; }
int get() { return x; }
};
class B
{
static A a;
public:
static int get()
{ return a.get(); }
};
int main(void)
{
B b;
cout << b.get();
return 0;
}
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