Functions and Procedures in C++
practice.

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

Content of header file h1.h
------------------------------------------------
h1.h
#include <iostream>
using namespace std;
namespace A{
	int func(int a){
		cout<<"using namespace A";
		return 2*a;
	}
}
------------------------------------------------
 
Content of header file h2.h
------------------------------------------------
 
h2.h
#include <iostream>
using namespace std;
namespace B{
	float func(float a){
		cout<<"using namespace B";
		return 2*a;
	}
}
------------------------------------------------
 
Content of program.cpp
------------------------------------------------
 
#include <iostream>
#include <string>
#include "h1.h"
#include "h2.h"
using namespace std;
using namespace A;
using namespace B;
int main(int argc, char const *argv[])
{
	/* code */
	int a = 10;
	float b = 10.0;
	cout<<func(a)<<endl;
	cout<<func(b);
	return 0;
}
-----------------------------------------------

Which of the following is important in a function?

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

Content of header file h1.h
------------------------------------------------
h1.h
#include <iostream>
using namespace std;
namespace A{
	int func(int a){
		cout<<"using namespace A";
		return 2*a;
	}
}
------------------------------------------------
 
Content of header file h2.h
------------------------------------------------
 
h2.h
#include <iostream>
using namespace std;
namespace B{
	float func(float a){
		cout<<"using namespace B";
		return 2*a;
	}
}
------------------------------------------------
 
Content of program.cpp
------------------------------------------------
#include <iostream>
#include <string>
#include "h1.h"
#include "h2.h"
using namespace std;
using namespace A;
using namespace B;
int main(int argc, char const *argv[])
{
	/* code */
	int a = 10;
	float b = 10.0;
	cout<<A::func(a)<<endl;
	cout<<A::func(b);
	return 0;
}
------------------------------------------------

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

#include <iostream>
using namespace std;
namespace first
{
    int x = 5;
    int y = 10;
}
namespace second
{
    double x = 3.1416;
    double y = 2.7183;
}
int main ()
{
    using first::x;
    using second::y;
    bool a, b;
    a = x > y;
    b = first::y < second::x;
    cout << a << b;
    return 0;
}

Which of the header file should be added in the following C++ code to properly run the program?

#include <iostream>
using namespace std;
int print_all (int num, ...)
{
    int sum = 0;
    va_list args;
    va_start (args,num);
    for (int i = 0; i < num; i++) 
    {
        int num = va_arg (args,int);
        cout<<num<<" ";
    }
    va_end (args);
    return sum;
}
int main (void)
{
    print_all(8, 1, 2, -1, 4, 12, -2, 9, 7);
    return 0;
}

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

#include <iostream>
#include <string>
using namespace std;
namespace A{
 
	int var = 10;
}
namespace B{
	int var = 5;
}
int main()
{
	int var = 20;
	using namespace B;
	cout<<var;
}

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

#include <iostream>
using namespace std;
#define MIN(a,b) (((a)<(b)) ? a : b)
int main ()
{
    float i, j;
    i = 100.1;
    j = 100.01;
    cout <<"The minimum is " << MIN(i, j) << endl;
    return 0;
}

What is the mandatory preprocessor directive for c++?

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

#include <iostream>
using namespace std;
void func(int x)
{
    cout << x ;
}
int main()
{
    void (*n)(int);
    n = &func;
    (*n)( 2 );
    n( 2 );
    return 0;
}

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

#include <iostream>
using namespace std;
void mani()
void mani()
{
    cout<<"hai";
}
int main()
{
    mani();
    return 0;
}

What does the client module import?

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

#include <iostream>
using namespace std;
namespace Box1
{
    int a = 4;
}
namespace Box2
{
    int a = 13;
}
int main ()
{
    int a = 16;
    Box1::a;
    Box2::a;
    cout << a;
    return 0;
}

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

#include <iostream>
#include <string>
using namespace std;
namespace A{
 
	int var = 10;
}
namespace B{
	int var = 5;
}
int main()
{
	using namespace B;
	cout<<var;
}

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

#include <iostream>
#include <string>
using namespace std;
namespace My_old_school_and_college_friends_number
{
	long int f1 = 9999999999;
	long int f2 = 1111111111;
}
namespace contacts = My_old_school_and_college_friends_number;
int main(){
 
	cout<<contacts::f1;
}

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

#include <iostream>
#include <exception>
using namespace std;
int main()
{
    try 
    {
        int * array1 = new int[100000000];
        int * array2 = new int[100000000];
        int * array3 = new int[100000000];
        int * array4 = new int[100000000];
        cout << "Allocated successfully";
    }
    catch(bad_alloc&) 
    {
        cout << "Error allocating the requested memory." << endl;
    }
    return 0;
}

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

#include <iostream>
using namespace std;
double division(int a, int b)
{
    if (b == 0) 
    {
        throw "Division by zero condition!";
    }
    return (a / b);
}
int main ()
{
    int x = 50;
    int y = 2;
    double z = 0;
    try 
    {
        z = division(x, y);
        cout << z;
    }
    catch(const char *msg) 
    {
        cerr << msg;
    }
    return 0;
}