Classes and Objects in C++
practice.

Which of the following is not a modifier function in string class?

In the case of friend operator overloaded functions how many maximum object arguments a unary operator overloaded function can take?

What will be the output of the following C++ code?

#include <iostream>
#include <complex>
using namespace std;
int main()
{
    complex<int> i(2, 3);
    i = i * 6 / 3;
    cout << i;
    return 0;
}

What will be the output of the following C++ code?

#include <iostream>
using namespace std;
class sample
{
    public:
    sample() 
    {  
        cout << "X::X()" << endl; 
    }
    sample( sample const & ) 
    {  
        cout << "X::X( X const & )" << endl;
    }
    sample& operator=( sample const & )
    { 
        cout << "X::operator=(X const &)" << endl;
    }
};
sample f() 
{
    sample tmp;
    return tmp;
}
int main() 
{
    sample x = f();
    return 0;
}

Which of the following operators can't be overloaded?

Which of the following statements is NOT valid about operator overloading?

What will be the output of the following C++ code?

#include <iostream>
using namespace std;
int main ()
{
    int a, b, c;
    a = 2;
    b = 7;
    c = (a > b) ? a : b;
    cout << c;
    return 0;
}

What will be the output of the following C++ code?

#include <iostream>
using namespace std;
class Distance
{
    private:
    int feet;
    int inches;
    public:
    Distance()
    {
        feet = 0;
        inches = 0;
    }
    Distance(int f, int i) 
    {
        feet = f;
        inches = i;
    }
    Distance operator()(int a, int b, int c)
    {
        Distance D;
        D.feet = a + c + 10;
        D.inches = b + c + 100 ;
        return D;
    }
    void displayDistance()
    {
        cout  << feet <<  inches << endl;
    }
};
int main()
{
    Distance D1(11, 10), D2;
    cout << "First Distance : ";
    D1.displayDistance();
    D2 = D1(10, 10, 10);
    cout << "Second Distance :";
    D2.displayDistance();
    return 0;
}

What will be the output of the following C++ code?

#include <iostream>
#include <string>
using namespace std;
class A
{
	int a = 5;
    public:
	void change(int i){
		a = i;
	}
	static void value_of_a(){
		cout<<a;
	}
};
 
int main(int argc, char const *argv[])
{
	A a1 = A();
	a1.change(10);
	a1.value_of_a();
	return 0;
}

Where does the object is created?

subscript operator is used to access which elements?

Which keyword is used to represent a friend function?

What will be the output of the following C++ code?

#include <iostream>
using namespace std;
class sample
{
    private:
    int var;
    public:
    void input()
    {
       cout << var;
    }
    void output()
    {
       cout << "Variable entered is ";
       cout << var << "\n";
    }
};
int main()
{
    sample object;
    object.input();
    object.output();
    object.var();
    return 0;
}

What is Character-Array?

What will be the output of the following C++ code?

#include <iostream>
#include <string>
using namespace std;
class Box
{
	int capacity;
    public:
	Box(int cap){
		capacity = cap;
	}
 
	friend void show();
};
 
void show()
{	
	Box b(10);
	cout<<"Value of capacity is: "<<b.capacity<<endl;
}
 
int main(int argc, char const *argv[])
{
	show();
	return 0;
}

Pick the incorrect statements out of the following.

What will be the output of the following C++ code?

#include <iostream>
#include <string>
using namespace std;
class A
{
	int a;
 
   public:
	int assign(int i) const {
		a = i;
	}
	int return_value() const {
		return a;
	}
};
int main(int argc, char const *argv[])
{
	A obj;
	obj.assign(5);
	cout<<obj.return_value();
}

What will be the output of the following C++ code?

#include <iostream>
#include <string>
using namespace std;
int main ()
{
    string str ("Microsoft");
    for (size_t i = 0; i < str.length();)
    {
        cout << str.at(i-1);
    }
    return 0;
}

What will be the output of the following C++ code?

#include <stdio.h> 
#include<iostream>
using namespace std;
int main()
{
    int a = 21;
    int c ;
    c = a++;
    cout << c;  
    return 0;
}

Which keyword is used to define the user defined data types?