C++ programming functions, blocks Aptitude Questions and Answers

#include <iostream>
using namespace std;

void fun1(int x)
{
	cout<<x<<endl;
}

int main()
{
	//function calling
	fun1(10,20);
	return 0;
}
    

1. Run Time Error
2. Compile Time Error
3. 10
4. 10, 20

#include <iostream>
using namespace std;

int main()
{
	//function declaration
	void fun(void);
	//function calling
	fun();
	cout<<"::OK"<<endl;
	return 0;
}
//function definition
void fun(void)
{
	cout<<"Hello";
}
    

1. Compile Time Error
2. Run Time Error
3. ::OK
4. Hello::OK

#include <iostream>
using namespace std;

//declaration and definition
void print_value(int x,int y=10)
{
	cout<<"x:"<<x<<",y:"<<y<<endl;
}
int main()
{

	//function calling
	print_value(100);
	return 0;
}
    

1. x:100,y:10
2. x:100,y:100
3. x:100,y:Garbage
4. Error

#include <iostream>
using namespace std;

//declaration and definition
void fun(const int x=10)
{
	cout<<"x:"<<x<<endl;
}
int main()
{
	const int a=100;
	cout<<"call 1:";
	fun();
	cout<<"call 2:";
	fun(a);
	return 0;
}
    

1. Call 1:x:10
   Call 2:x:100
2. Call 1:x:10
   Call 2:x:10
3. Call 1:x:100
   Call 2:x:100
4. Error

#include <iostream>
using namespace std;

namespace myfunctions
{
	void fun1(void)
	{
		cout<<"Fun1"<<endl;
	}
}
int main()
{
	.....
	return 0;
}
    

1. fun1();
2. myfunctions.fun1();
3. myfunctions::fun1();
4. myfunctions->fun1();

#include <iostream>
using namespace std;

namespace myfunctions
{
	void fun1(void)
	{
		cout<<"Fun1"<<endl;
	}
	void fun1(int a)
	{
		cout<<a<<endl;
	}
}
int main()
{
	myfunctions::fun1(10.2f);
	return 0;
}
    

1. Error
2. 10
3. 10.200000
4. 10.2