#include<iostream>
using namespace std;
void printmessage() {
    cout << "Im Function In C++";
}

int main() {
    //Call Simple Function printmessage()
    printmessage();
    
    return 0;
}
    

 
#include<iostream>
using namespace std;
int addition(int a,int b);

int main()
{
	int num1, num2,add;
	
	cout<<"Enter first number: ";
	cin>>num1;
	cout<<"Enter second number: ";
	cin>>num2;
	add=addition(num1,num2);
	cout<<"Addition is: "<< add<< endl;
	return 0;
}

int addition(int a,int b)
{
	return (a+b);
}
    

 
#include<iostream>
using namespace std;
void swap(int,int);
int main()
{
        int num1,num2;
        cout<<"\n Enter First Number : ";
        cin>>num1;
        cout<<"\n Enter Second Number : ";
        cin>>num2;
        cout<<"\n Before Swapping the Value : \n"<<" "<< num1<<"\t"<< num2<<"\n";
        swap(num1,num2);
        cout<<"\n  After Swapping the Value : \n"<<" "<< num1<<"\t"<< num2<<"\n";
}
void swap(int num1,int num2)
{
        int num3;
        num3=num1;
        num1=num2;
        num2=num3;
      
}
    

 
#include<iostream>
using namespace std;
void swap (int &x, int &y)
{
        int temp;
        temp=x;
        x=y;
        y=temp;
}
int main()
{
        int a,b;
        cout<<"Enter the value of a and b";
        cin>>a>>b;
        cout<<"\n Before swapping"<<"\n A = "<< a<<"\n B = " << b<< endl;
        swap(a,b);
        cout<<"\n After swapping"<<"\n A = "<< a<<"\n B = " << b<< endl;
        return 0;
} 
    

 
#include<iostream>
using namespace std;
int fibonacci(int num)
{
        if((num==1)||(num==0))
        {
                return(num);
        }
        else
        {
                return(fibonacci(num-1)+fibonacci(num-2));
        }
}
int main()
{
        int num,i=0;
        cout<<"\n How many numbers you want for Fibonacci Series : ";
        cin>>num;
        cout<<"\n Fibonacci Series : ";

        while(i< num)
        {
                cout<<" "<< fibonacci(i);
                i++;
        }
    return 0;
}
    

 
#include<iostream>
using namespace std;
int factorial(int n);

int main()
{
    int n;

    cout << "Enter number: ";
    cin >> n;

    cout << "Factorial of " << n << " = " << factorial(n);

    return 0;
}

int factorial(int n)
{
    if(n > 1)
        return n * factorial(n - 1);
    else
        return 1;
}