Objectives: 1) Define classes; 2) Split interface and implementation into files; 3) Instantiate objects; 4) Use objects in a client or driver function.

Project description: In this assignment, you will create a class representing a gasoline pump. The pump will maintain a running total of the amount of fuel dispensed and revenues collected. The driver program will simulate fuel demand for a number of vehicles.

Requirements: 1. Your program must be split into three files, the requirements for which are specified below:

a) The class interface or declaration, file

Must be named gaspump.h Must contain #include guards for GASPUMP_H Will have these private members

i. A string containing the type of gas the gas pump holds ii. A double representing the amount of fuel on hand (in gallons) iii. A double representing the fuel pumps capacity (in gallons) iv. A double that holds the price per gallon v. A double to represent the amount of fuel dispensed per purchase vi. A double representing the total amount of fuel dispensed (all purchases) vii. A double that stores the total amount of money collected (all purchases) viii. A bool that indicates whether the next customer should be turned away as fuel is replenished ix. A function that replenishes the fuel pumps tank when it runs out of fuel Must have these public members i. A single constructor with three parameters: a standard string (std::string) that holds the type of gasoline in the pump, a double representing the maximum capacity of the tank in gallons, and a double for the price per gallon. ii. An inline accessor function that returns a standard string for the pumps fuel type iii. An inline accessor function that returns the total amount of fuel dispensed (all purchases) iv. An inline accessor function that returns the total amount of revenue collected (all purchases) v. A void function named dispenseFuel, that controls the fueling of vehicles

b) A class implementation, or definition, file

Must be named gaspump.cpp Will have the implementation for the following functions

i. Constructor This function has three parameters that map directly to data members; it should also initialize the fuel quantity on hand to the maximum tank capacity (i.e., start at full capacity) ii. Replenish This function should simply reset the fuel level to the maximum capacity, and output a message to that effect, as shown in the sample output below iii. dispenseFuel This function is the heart of the class, and controls the fueling of a single vehicle. It accepts a double argument that indicates the number of gallons requested by the vehicle. It should begin by setting the number of decimal places for output to 2, with the following statements:

std::cout << std::fixed;

std::cout.precision(2);

It will also A. Display all of the message shown in the example output exactly as shown (verbatim) B. Ensure that it only dispenses fuel if the tank is not being filled (in which case the customer is turned away) C. Ensure that the pump dispenses no more than the amount of fuel on hand. If the vehicles fuel demand exceeds the amount of fuel on hand, the vehicle gets all of the fuel on hand, and the next customer is turned away as the fuel is replenished. The amount desired and amount actually dispensed should be output as shown. D. Keep track of fuel dispensed E. Keep track of revenue collected (gallons * price per gallon)

c) A driver, or client, file Must be named proj2.cpp Will instantiate 3 objects of the GasPump class: named unleaded (initialize to Unleaded, 200 gallon capacity, and 2.59 per gallon), midgrade (initialize to Midgrade, 125 gallon capacity, and 2.87 per gallon), and premium (initialize to Premium+, 100 gallon capacity, and 3.13 per gallon). Note + after Premium. Declare a pointer to a GasPump object (will be used to select which pump a vehicle will use) Set the random number generator seed to 1000 : srand(1000); Create a for loop to simulate 50 vehicles; for each iteration o Determine which pump the vehicle will fuel from Set the pointer to the unleaded pump (i.e. assume that the vehicle wants unleaded gas) Draw a random number: int rnd = rand(); Take the remainder (i.e., mod 7) of rnd, and if it is 4 or 5, set the pointer to midgrade, if it is 6 set it to premium otherwise leave it at unleaded. Do not reassign rnd (i.e., rnd=rnd%7;). Note: The above establishes a probability distribution where, after infinitely many draws, unleaded is picked ~ 57% of the time (4 out of 7), midgrade around 29% of the time (2 out of 7), and premium about 14% of the time (1 out of 7). Be sure you understand how/why. o Determine the amount of fuel the vehicle requires Use the same number drawn above to get the amount of fuel to be dispensed, through the following statement: reqFuel = 3+ (((double)rnd) / RAND_MAX) * 22; The above establishes a fuel demand for the vehicle, between 3 and 25 gallons o Use the pointer to invoke the dispenseFuel function for the appropriate pump o Output Vehicle X as shown in the screenshot below (remaining output is from the pump object) Upon exiting the loop, output the total fuel dispensed and total revenue collected for each pump, as shown