Which of the following statement is correct about the program given below?

#include<iostream.h> 
class AptitudeCrack
{
    int x; 
    float y; 
    public:
    void AptitudeFunction(int = 0, float = 0.00f, char = 'A');
    void AptitudeFunction(float, int = 10.00, char = 'Z');
    void AptitudeFunction(char, char, char);
};
int main()
{
    AptitudeCrack objAptitude;
    objAptitude.AptitudeFunction(10 * 1.0, int(56.0)); 
    return 0;
}
void AptitudeCrack::AptitudeFunction(int xx, float yy, char zz)
{
    x = xx + int(yy);
    cout<< 'x = ' << x << endl;
}
void AptitudeCrack::AptitudeFunction(float xx, int yy, char zz)
{
    x = zz + zz;
    y = xx + yy;
    cout<< ' x = ' << x << endl;
}
void AptitudeCrack::AptitudeFunction(char xx, char yy, char zz)
{
    x = xx + yy + zz; 
    y = float(xx * 2); 
    cout<< ' x = ' << x << endl;
}