6.
What will be the output of the following C++ code?
#include <iostream>
using namespace std;
class sample;
class sample1
{
int width, height;
public:
int area ()
{
return (width * height);}
void convert (sample a);
};
class sample
{
private:
int side;
public:
void set_side (int a)
{
side = a;
}
friend class sample1;
};
void sample1::convert (sample a)
{
width = a.side;
height = a.side;
}
int main ()
{
sample sqr;
sample1 rect;
sqr.set_side(6);
rect.convert(sqr);
cout << rect.area();
return 0;
}
a) 24
b) 35
c) 16
d) 36
7.
What will be the output of the following C++ code?
#include <iostream>
using namespace std;
class base
{
int val1, val2;
public:
int get()
{
val1 = 100;
val2 = 300;
}
friend float mean(base ob);
};
float mean(base ob)
{
return float(ob.val1 + ob.val2) / 2;
}
int main()
{
base obj;
obj.get();
cout << mean(obj);
return 0;
}
a) 200
b) 150
c) 100
d) 300
8.
What will be the output of the following C++ code?
#include <iostream>
using namespace std;
class sample
{
private:
int a, b;
public:
void test()
{
a = 100;
b = 200;
}
friend int compute(sample e1);
};
int compute(sample e1)
{
return int(e1.a + e1.b) – 5;
}
int main()
{
sample e;
e.test();
cout << compute(e);
return 0;
}
a) 100
b) 200
c) 300
d) 295
9.
Pick out the correct statement.
a) A friend function may be a member of another class
b) A friend function may not be a member of another class
c) A friend function may or may not be a member of another class
d) None of the mentioned
10.
Where does the keyword ‘friend’ should be placed?
a) function declaration
b) function definition
c) main function
d) block function
