Study the following class interface for the class CashRegister:

class CashRegister

$\{$

public:

void set$\_$item$\_$count$($int count$)$;

void view$()$ const;

void view$\_$count$()$ const;

CashRegister$()$;

CashRegister$($int item$\_$count$)$;

CashRegister$($double cash$\_$balance$)$;

CashRegister$($int item$\_$count, double cash$\_$balance$)$;

private:

int item$\_$count$1$;

double cash$\_$balance$1$;

$\}$;