write a c++ program to define a class for a calculator with data member as number1 and number2(both as double) and methods as add(),sub(),mul(),div().create an array of 5 objects of  calculator.use parameterized  constructor to initialize the values.display output of all four arthematic operations.

Develop an algorithm and write a C++ program that counts the letter occurrence in the string; make sure you use call by reference to the array of a class with letter and count as private member attributes when return from parse function. For the class member methods, provide the public accessor and modifier as well as print functions for the private member attributes. Write a test program that reads a C-string and displays the number of letters [a-z] and number of numbers [0-9] in the string. In addition to that, you need to output the histogram of the letter and count array. Here is a sample run of the program: <Output> Enter a string: 2023 is coming The number of letters in 2023 is coming is 8 The number of numbers in 2023 is coming is 4 ---- Histogram ---- Char Count 0 1 2 2 3 1 c 1 g 1 i 2 m 1 n 1 /* not a completed output */ <End Output>

Write a C++ program to create a new date by the user.  The user will type in month, day, and year with a function called readDate( ) with appropriate parameters.  Define a class called Date, with month, day, and year as private members with integer values, and a public member function, setDate( ), which will set the input dates, and showDate( ) to display the input date as an output for the class.

Kindly Solve this C++ question as per the instructions. Thank you for your help!   Instructions: 1- Put the class definition in Flight.h and the implementation of the constructors and functions in Flight.cpp Implement the Flight.h and Flight.cpp so that class Flight contains: 4 private instance variables: Name of data type string, which describe the three electric vehicle charger types (AC975, DL521, and AC863). Destination of data type string that shows the final destination of that flight. Hour and Minute of data type int that show the departure time. A default constructor which sets all of the numeric instance variables to zero and the String instance variables to null. A constructor with 4 parameters that sets the 4 instance variables to the corresponding values passed.  Implement an accessor method for each information (Flight name, Flight destination, and Flight Time) that will return the value of the instance variable. For example, the getX() method for the instance variables…