C++ | Friend function 13

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

Number Of Visitors

0270413