Traffic Flow

Traffic engineers use systems of equations to study the flow of traffic. The analysis of traffic flow is based on the principle that the number of cars that enter and leave an intersection must be equal. Suppose the traffic flow for some one-way streets can be modeled by the diagram below, where the numbers and the variables represent the numbers of cars entering or leaving an intersection per hour.

Let x1, x2, and x3 represent the number of cars per hour that are traveling on AC, AB, and BC, respectively. Consider intersection A. There are 300 + 200 = 500 cars per hour entering A and x1 + x2 cars leaving A. Therefore, x1 + x2 = 500. For intersection B, we have 50 + x2 cars per hour entering the intersection and 100 + x3 cars leaving the intersection. Thus 50 + x2 = 100 + x3, or x2 – x3 = 50. Applying the same reasoning to C, we have x1 + x3 = 450. These equations result in the system of equations:

Using this example, estimate the traffic flow for a roundabout presented below. The graphical model shows the number of cars per hour that are entering or leaving a roundabout. If the portion of the roundabout between A and B has an estimated traffic flow of from 6[e] to 8[a] cars per hour, what is the estimated traffic flow between C and A, and between B and C?

For 6[e] to 8[2]. my numbers are 6[5] to 8[2]

I have worked the problem out as much as I can, I feel like on the I have done something wrong on the finding x2 at the end.  I have attached my word doc.  If you don’t mind can you take a look at my problem and let me know if I have done something wrong.

 

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modify the firm example from this chapter such that all employees can be given different vacation options depending on their classification.Modify the driver program to demonstrate this new Functionality.The Classes and templates are attached so you really only need to set up a polymorphic println in Staff payday method to print the stafflist[count].vacation());.Then in staffmember create an abstract method for an int named vacation.And then for each type of employee define the vacation method to return the number of vacation days for that type of employee. (0 for volunteers, 7 for hourly, 14 for regular, 21 for executives.)

 

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Modify the Date class you wrote for Lab1_Ex1 Date Class (fr. Programming Challenge 1 of Chapter 13). The class should implement the following exception classes:InvalidDay Throw when an invalid day (< 1 or > monthEnds[m]) is passed to the class.InvalidMonth Throw when an invalid month (< 1 or > 12) is passed to the class.Write a user interface application to allow user to enter different scenario of the user input date data:Enter the Date as 6 30 2014: 1 30 2014January 30 2014Enter the Date as 6 30 2014: -3 30 1200Error: -3 is an invalid value for the Date’s month.Enter the Date as 6 30 2014: 3 32 2014Error: 32 is an invalid value for the Date’s day.Enter the Date as 6 30 2014: 1 2 -200January 2 200 B.C.Enter the Date as 6 30 2014:After the exception is thown and catched, the application have to continue to run.You may set a sentinel value for the loop as the year 2050.Starter: lab9_ex1_starter.cpp (a working lab1_ex1.cpp).Submit: lab9_ex1.cpp

 

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Modify the attribute grammar of Example 3.6 in Sebesta so that it uses only a single (synthesized) attribute.Ex 3.6:An Attribute Grammar for Simple Assignment StatementsSyntax rule: → = Semantic rule: .expected_type ← .actual_typeSyntax rule: → [2] + [3] Semantic rule: .actual_type ←Predicate:if ([2].actual_type = int) and ([3].actual_type = int)then int else realend if.actual_type == .expected_typeSyntax rule: → Semantic rule: .actual_type ← .actual_type Predicate: .actual_type == .expected_typeSyntax rule: →A | B | CSemantic rule: .actual_type ← look-up(.string)The look-up function looks up a given variable name in the symbol table and returns the variable’s type.

 

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Modify Lab Five such that you use functions for each math calculation (Add, Subtract, Multiply, and Divide). Pass in parameters to each function for the values to use and the functions will return the result. Use a function to read in the numbers involved. These numbers will be doubles. Also write function that reads in the operator and returns a boolean – true if the operator is valid, false if not valid. This function will have two parameters. First is a “C-type” string of characters containing the valid operators. The second is a reference parameter where the operator will be placed if the operator entered is valid. 

Please write the code for C programming

My lab 5 code:

#include<stdio.h>

int main()

{

 

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