81. Inline functions are avoided when . . . . . . . .
82. What will be the output of the following C++ code?
#include <iostream>
using namespace std;
class rect
{
int x, y;
public:
void val (int, int);
int area ()
{
return (x * y);
}
};
void rect::val (int a, int b)
{
x = a;
y = b;
}
int main ()
{
rect rect;
rect.val (3, 4);
cout << "rect area: " << rect.area();
return 0;
}
#include <iostream>
using namespace std;
class rect
{
int x, y;
public:
void val (int, int);
int area ()
{
return (x * y);
}
};
void rect::val (int a, int b)
{
x = a;
y = b;
}
int main ()
{
rect rect;
rect.val (3, 4);
cout << "rect area: " << rect.area();
return 0;
}83. What is a friend function in C++?
84. Pick the correct statement.
85. What will be the output of the following C++ code?
#include <iostream>
using namespace std;
class Box
{
double length;
double breadth;
double height;
public:
double getVolume(void)
{
return length * breadth * height;
}
void setLength( double len )
{
length = len;
}
void setBreadth( double bre )
{
breadth = bre;
}
void setHeight( double hei )
{
height = hei;
}
Box operator+(const Box& b)
{
Box box;
box.length = this->length + b.length;
box.breadth = this->breadth + b.breadth;
box.height = this->height + b.height;
return box;
}
};
int main( )
{
Box Box1;
Box Box2;
Box Box3;
double volume = 0.0;
Box1.setLength(6.0);
Box1.setBreadth(7.0);
Box1.setHeight(5.0);
Box2.setLength(12.0);
Box2.setBreadth(13.0);
Box2.setHeight(10.0);
volume = Box1.getVolume();
cout << "Volume of Box1 : " << volume <<endl;
volume = Box2.getVolume();
cout << "Volume of Box2 : " << volume <<endl;
Box3 = Box1 + Box2;
volume = Box3.getVolume();
cout << "Volume of Box3 : " << volume <<endl;
return 0;
}
#include <iostream>
using namespace std;
class Box
{
double length;
double breadth;
double height;
public:
double getVolume(void)
{
return length * breadth * height;
}
void setLength( double len )
{
length = len;
}
void setBreadth( double bre )
{
breadth = bre;
}
void setHeight( double hei )
{
height = hei;
}
Box operator+(const Box& b)
{
Box box;
box.length = this->length + b.length;
box.breadth = this->breadth + b.breadth;
box.height = this->height + b.height;
return box;
}
};
int main( )
{
Box Box1;
Box Box2;
Box Box3;
double volume = 0.0;
Box1.setLength(6.0);
Box1.setBreadth(7.0);
Box1.setHeight(5.0);
Box2.setLength(12.0);
Box2.setBreadth(13.0);
Box2.setHeight(10.0);
volume = Box1.getVolume();
cout << "Volume of Box1 : " << volume <<endl;
volume = Box2.getVolume();
cout << "Volume of Box2 : " << volume <<endl;
Box3 = Box1 + Box2;
volume = Box3.getVolume();
cout << "Volume of Box3 : " << volume <<endl;
return 0;
}
86. How to declare operator function?
87. What will be the output of the following C++ code?
#include <iostream>
#include <string>
using namespace std;
int main ()
{
string str ("Ubuntu");
cout << str.capacity();
cout << str.max_size();
return 0;
}
#include <iostream>
#include <string>
using namespace std;
int main ()
{
string str ("Ubuntu");
cout << str.capacity();
cout << str.max_size();
return 0;
}88. What is the use of functor?
89. What will be the output of the following C++ code?
#include <iostream>
using namespace std;
void duplicate (int& a, int& b, int& c)
{
a *= 2;
b *= 2;
c *= 2;
}
int main ()
{
int x = 1, y = 3, z = 7;
duplicate (x, y, z);
cout << x << y << z;
return 0;
}
#include <iostream>
using namespace std;
void duplicate (int& a, int& b, int& c)
{
a *= 2;
b *= 2;
c *= 2;
}
int main ()
{
int x = 1, y = 3, z = 7;
duplicate (x, y, z);
cout << x << y << z;
return 0;
}90. What will be the output of the following C++ code?
#include <iostream>
using namespace std;
int main()
{
int a = 20;
int b = 10;
int c = 15;
int d = 5;
int e;
e = a + b * c / d;
cout << e << endl ;
return 0;
}
#include <iostream>
using namespace std;
int main()
{
int a = 20;
int b = 10;
int c = 15;
int d = 5;
int e;
e = a + b * c / d;
cout << e << endl ;
return 0;
}Read More Section(Classes and Objects in C plus plus)
Each Section contains maximum 100 MCQs question on Classes and Objects in C plus plus. To get more questions visit other sections.