Object-Oriented Programming ------------------------------------

(Factorials) Factorials are used frequently in probability problems. The factorial of a positive integer n (written n! and pronounced “n factorial”) is equal to the product of the positive integers from 1 to n. Write an application that calculates the factorials of 1 through 20. Use type long . Display the results in tabular format. What difficulty might prevent you from calculating the factorial of 100?

(Find the second lowest interger number) Write a program that prompts the user to enter a set of integer numbers, and finally displays the second lowest integer number in the set. To exit from the program enter -1.

When you perform arithmetic operations with operands of different types, such as adding an int and a float, ____________. C# chooses a unifying type for the result you must choose a unifying type for the result you must provide a cast you receive an error message

(Check the speed) Write a program that prompts the user to enter the speed of a vehicle. If speed is less than 20, display too slow; if speed is greater than 80, display too fast; otherwise, display just right.

(DEBUG AND MAKE A FLOWCHART OF THIS PROGRAM) // This pseudocode is intended to display// employee net pay values. All employees have a standard// $45 deduction from their checks.// If an employee does not earn enough to cover the deduction,// an error message is displayed.// This example is modularized.start   Declarations      string name      string EOFNAME = ZZZZ   while name not equal to EOFNAME      housekeeping()   endwhile   while name not equal to EOFNAME      mainLoop()   endwhile   while name not equal to EOFNAME      finish()   endwhilestop housekeeping()   output "Enter first name or ", EOFNAME, " to quit "return mainLoop()   Declarations      num hours      num rate      num DEDUCTION = 45      num net   output "Enter hours worked for ", name   input hours   output "Enter hourly rate for ", name   input rate   gross = hours * rate   net = gross - DEDUCTION   if net > 0 then      output "Net pay for ", name, " is ", net   else      output "Deductions not covered. Net is…

(True/False): It is possible to define a procedure inside an existing procedure

(Sort three integers) Write a program that prompts the user to enter THREE integers and display the integers in decreasing order. Prepare your problem analysis and algorithm (pseudocode or flowchart) to plan your solution.

5. (Algebra: solve 2 X 2 linear equations) You can use Cramer's rule to solve the following 2 X 2 system of linear equation: ax + by = e cx + dy = f ● x = ed - bf bc ad y = af - ec ad bc - Write a program that prompts the user to enter a, b, c, d, e, and f and display the result. If ad- bc is 0, report that The equation has no solution. Enter a, b, c, d, e, f: 9.0, 4.0, 3.0, -5.0, -6.0, -21.0 Enter x is -2.0 and y is 3.0 Enter a, b, c, d, e, f: 1.0, 2.0, 2.0, 4.0, 4.0, 5.0 Enter The equation has no solution