Give me C$++$ coding for personal finance tracker by using array to keep the data of expenses, searching for user search expenses by category, sorting to sort the data from low to high and class to seperate one by one function.

the code of expenses class here:

class expenses

$\{$

public:

expenses$()$;

~expenses$()$;

void fill$()$;

void display$()$;

void exit$()$;

private:

int$*$ Array;

$\}$;