Write a program vigenere. cpp. it should contain a function encryptvigenere implementing this cipher: string encryptvigenere(string plaintext, string keyword); you may assume that the keyword contains only lowercase alphabetic characters a - z. the main should implement a testing interface similar to the one in task b, the user enters the plaintext and the keyword, and the program reports the ci

Advantages and disadvantages of binary system

Ou listened to a song on your computer. did you use hardware or software?

Consider the following code snippet: #ifndef cashregister_h#define cashregister_hconst double max_balance = 6000000.0; class cashregister{public: cashregister(); cashregister(double new_balance); void set_balance(double new_balance); double get_balance() const; private: double balance[12]; }; double get_monthly_balance(cashregister bk, int month); #endifwhich of the following is correct? a)the header file is correct as given.b)the definition of max_balance should be removed since header files should not contain constants.c)the definition of cashregister should be removed since header files should not contain class definitions.d)the body of the get_monthly_balance function should be added to the header file.