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Completing and extending the C++ program that evaluates statements of an expression language.
The statements of that expression language consist of an arithmetic expression followed by a list of assignments. Assignments are separated from the expression and each other by commas. A semicolon terminates the expression. The arithmetic expressions are fully parenthesized infix expressions containing integer literals and variables. The valid arithmetic operators are +, -, *, /. Tokens can be separated by any number of spaces. Variable names begin with an alphabetic character, followed by any number of alphanumeric characters. Variable names are case sensitive. This syntax is described by BNF and regular expressions in the case study. The program reads in the arithmetic expression and encodes the expression as a binary tree. After the expression has been read in, the variable assignments are read in and the variables and their values of the variables are placed into the symbol table. Finally the expression is evaluated recursively. Your first task is to complete the program provided by providing the three missing classes, Minus, Times and Divide. Next, you should extend the program so that it supports relational, logical and conditional expression operators as defined by the following extension to the grammar: -> '(' ')' | '(' ':' '?' ')' | '(' '!' ')' -> '+' | '-' | '*' | '/' | '>' | '<' | '=' | '&' | '|' Note that there are a few differences in the use of these operators compared to their customary use in the C family of languages. In the conditional expression operator the symbols are reversed and the third operand represents the condition. The first operand is the value when true and the second the value when false The logical operators use single symbols not double, for example the and operator is & not && The negation operator ! is a postfix operator, not a prefix one There are only three relational operators not the usual six and the operator for equality is = not == Like C and C++, any arithmetic expression can be interpreted as a logical value, taking 0 as false and anything else as true Your final task is to make the following two modifications to the program: The program should accept input from a file, allowing for multiple expressions arranged one per line. Some hints for accomplishing this transformation will be provided in the conference All results should be changed from double to int. In particular the evaluate function should return an int.
This code should include a loop that displays income generated from ticket sales for each night. Shows are performed on Thursday, Friday and Saturday nights.
Assume we have an array named $students. Each entry in the array contains a student's full name (e.g. "Jane Smith"). Write the PHP code needed to display all students (in the array) whose first name starts with the letter "J".
A constructor that will take a single integer argument representing a whole number of feet • A constructor that will take two integer arguments representing feet and inches respectively • A constructor that will take three integer arguments represent..
Given the following test scores and grade equivalents, write a function which is passed a score, and returns a letter grade based on the score entered. A number less than 0 or greater than 100 is invalid.
Write a program in c++ that takes 100 number in an array and add them and print the sum
Initially, the grid is populated randomly with occupied and empty cells. Once the initial grid has been created, the program loops. Each iteration of the loop represents a tick or time step in the environment.
C language, compute a program that calculates three RESISTANCE inputs, and gives you the total resistance in OHMS. Like this, the total resistance is _____ ohms. These are three parallel circuits so the formula would be (1/R1 + 1/ R 2 + 1/ R 3 ) -1
Write C++ statements to do the following: Declare an array alpha of 15 components of the type int. Output the value of the tenth component of the array alpha.
Assign passed value to this member and another function to return value. Your main should read the integer from an input data file, and write the output to the output data file.
A text file students.txt contains student records (name, date of birth, and GPA). Write a program that reads student records from students.txt and creates an array of student structures
Create and write a c++ program which inputs series of 24 hourly temperatures from file, and outputs bar chart (using stars) of temperatures for the day.
Write down the C++ function which will accept the character array of at most 30 cells. Your function must return true if string and its reverse are identical;
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