C++ Programming - Functions

#include<iostream.h> 
class IndiaBix
{ 
    public:
    void Bix(int x = 15)
    {
        x = x/2; 
        if(x > 0)
            Bix(); 
        else
            cout<< x % 2; 
    } 
};
int main()
{
    IndiaBix objIB;
    objIB.Bix();
    return 0; 
}

#include<iostream.h>
long GetNumber(long int Number)
{
    return --Number;
}
float GetNumber(int Number)
{
    return ++Number;
}
int main()
{
    int x = 20;
    int y = 30;
    cout<< GetNumber(x) << " ";
    cout<< GetNumber(y) ;
    return 0; 
}

#include<iostream.h> 
struct MyData
{
    public:
    int Addition(int a, int b = 10)
    {
        return (a *= b + 2);
    }
    float Addition(int a, float b);
};
int main()
{
    MyData data;
    cout<<data.Addition(1)<<" ";
    cout<<data.Addition(3, 4);
    return 0; 
}

#include<iostream.h>
int BixTest(int x, int y);
int BixTest(int x, int y, int z = 5);
int main()
{
    cout<< BixTest(2, 4) << endl; 
    return 0;
}
int BixTest(int x, int y)
{
    return x * y;
}
int BixTest(int x, int y, int z = 5)
{
    return x * y * z; 
}

#include<iostream.h> 
class IndiabixSample
{
    public:
        int   a; 
        float b;
        void BixFunction(int a, float b, float c = 100.0f)
        {
            cout<< a % 20 + c * --b;
        } 
}; 
int main()
{   IndiabixSample objBix;
    objBix.BixFunction(20, 2.000000f, 5.0f);
    return 0; 
}