What is type checking in programming languages? The process of verifying that the operands of an operation are of compatible types. ○ A way to optimize the execution of a program. ○ Ensuring that all variables are declared before use. Checking if the program will terminate correctly. In operational semantics, what does the notation e → e' represent? OA small step where expression e reduces to expression e'. ○ The execution of a full program. The final output of the program. A rule that type-checks an expression.
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- You are designing the syntax for a new language. The following example presents a loop statement in the language. In this example the tokens “aNumber” and “aResult” are the variable names. A variable name that can be created by the programmer can consist of any combination of alphanumeric characters and underscores. A variable name can be of any length. The tokens “from”, “get”, and “do” are keywords in the language. The list “1,34,21,678” is an example list of numbers from which the “aNumber” variable gets its values one by one. The list length can be of any size. The members of the list are numbers of any length and they are separated by commas. The operators “=” and “*” are keywords in the language. The language provides the operators “+”, “-”, and “/” too. Write BNF rules to specify the loop statement in this language. Call the start symbol “loop”. Please note in the context-free grammars we do not need to check what value is stored in a non-terminal. Therefore, a variable name…Making choices with the conditional expression LISP provides a control structure called the conditional expression that works like an if statement in C++. It tests a condition and runs either a consequent expression or an alternative expression, depending on the truth value of the condition. The entire conditional expression then returns the value of the consequent or the alternative expression. Type the following conditional expression at the interpreter's prompt: |(if (> 4 3) 4 3) What value is returned? Now we'll define a function that solves a general problem, finding the maximum of two numbers, using the following conditional expression: |(define (maximum x y) (if (> x y) y)) Test this function with several pairs of numbers.Exercise 4 Suppose there are three variables X, Y, and Z with these types: X: integer that is divisible by 3 Y: integer that is divisible by 12 Z: integer For each of the following assignments, knowing nothing about the values of the variables except their types, answer whether a language system can tell before run- ning the program whether the assignment is safe? Why or why not? a. X = Y b. X = X c. Y := y + 1 d. Z : = X e. X : = Z f. X = X + 3 g. X = X + Y You need to work on part (d - g) following the examples in part (a- c)
- Use C++ Language Create a program that will determine if a student needs to take a final exam. This decision depends on the course grade average and the student’s attendance. Use the flow chart below for the final exam criteria.solve in c#By using examples differentiate between a single‐alternative and a dual‐alternativeif statement.
- Develop an algorithm for the following problem statement. Your solution should be in pseudocode with appropriate comments. Warning: you are not expected to write in any programming-specific languages, but only in the generic structured form as stipulated in class for solutions design. A coffee shop pays its employees biweekly. The owner requires a program that allows a user to enter an employee's name, pay rate and then prompts the user to enter the number of hours worked each week. The program validates the pay rate and hours worked. If valid, it computes and prints the employee's biweekly wage. According to the HR policy, an employee can work up to 55 hours a week, the minimum pay rate is $17.00 per hour and the maximum pay rate is $34.00 per hour. If the hours work or the pay rate is invalid, the program should print an error message, and provide the user another chance to re-enter the value. It will continue doing so until both values are valid; then it will proceed with the…create a program in c that mimics the following dice game: A player rolls two dice. Each die has six faces. These faces contain 1, 2, 3, 4, 5, and 6 spots. After the dice have come to rest, the sum of the spots on the two upward faces is calculated. If the sum is 7 or 11 on the first throw, the player wins. If the sum is 2, 3, or 12 on the first throw the player loses. If the sum is 4, 5, 6, 8, 9, or 10 on the first throw, then the player must conitue to roll again until they roll that same number again in order to win. The player loses by rolling a 7 before making the point. Write a program in c that implements this game according to the above rules. The game should allow for wagering. This means that you need to prompt that user for an initial bank balance from which wagers will be added or subtracted. Before each roll prompt the user for a wager.Write a C++ program Design and write a program that will accept a sentence as input, reverse the words and print the sentence out backwards. The individual words should not be reversed as we did in class. The words in the sentence should be in reverse order. Example Input: The movie was not very true to the book.Output: book the to true very not was movie The (NOTE: You may keep the period at the end if you want to.) Turn in your design (Flow Diagram) along with your code and screen shots. You can use a program like PowerPoint or some other drawing package for this or you can draw it by hand then take a picture and upload the picture along with your code and output. The following problem requires the file dictionary_four_letter_words.txt. (unable to attach the file, but copied some of it below) aahs aals abas abba abbe abed abet able ably abos abri abut abye abysaced aces ache achy acid acme acne acre acta acts acyl adds adit adosadze aeon aero aery afar agar agas aged agee ager ages…
- 1. A set of premises and a conclusion are given. Use the valid argument forms learned in class to deduce the conclusion from the premises, giving a reason for each step. Assume all variables are statement variables. а. руд b. g → r С. рлs t d. ~r e. ~g → u AS f. .. tSolve in c programming language.Stuck need help! The class I'm taking is computer science discrete structures. Problem is attached. please view attachment before answering. Really struggling with this concept. Thank you so much.