This assignment will test your ability to write a C program that is made up of functions stored in

different files. The main point for this assignment is to demonstrate proper parameter passing. You

have to decide what parameters should be passed by copy versus passed as addresses, properly

dereferencing those parameters in your functions. Incorrect parameter passing or a lack of

demonstration that you know how to pass parameters properly will result in a low grade.

This program will compute city livability ratings based on various statistics. The input will come

from a text file. You will call an input function to read one city's information at one time from file,

using fscanf. After input, you will call various functions to perform computations on that city

to assign the city a rating. An output function will output to the console window the city's name,

rating and population density. An update function will keep track of values used to compute and

output the most livable city and the average city ranking.

Your program must be broken into the following functions. Each function, aside from main, will

be called from main. You must pass parameters appropriately.

main $-$ declare your variables, open the input text file, enter a while loop to call various

functions which will input one city's worth of data, compute various city ratings, compute

the city's livability, output the results and update running totals. After the loop, close the

input file and call a function to output summary information.

input $-$ this function will receive the FILE $*$ variable from main and use fscanf to input

a city's information. The information is$,$ in order, city name, population, square mileage,

pollution, crime, expense, number of highways; all values are ints except city name $($string$).$

As you need to get all the input values back to main, the parameters must all be passed

appropriately. To control the while loop in main, return the result of fscanf $($which will

be the number of values successfully input$).$ This result will be EOF upon reaching the end

of file. This is described more completely below.

population density $-$ this function will receive the city's population and square mileage,

compute and return the population density $($a double or float$).$ This is one of two functions

that computes and returns a single value so you can return the computed value through a

return statement rather than as a parameter if desired.

compute $-$ this function uses the int values input for pollution, crime, expense and number

of highways plus the computed population density to compute four ratings: pollution rating,

traffic rating, crime per capita, expense per capita. As this function has to return four

values, you must pass these as parameters. The equations for these computations are given

on the next page.

livability $-$ compute and return the city's livability; as with population density, this is a

single computation that can $($but does not have to$)$ be returned via a return statement.

The equation for livability is given on the next page.

output $-$ output this city's name, livability value and population density, in a formatted

way. See the example output at the end of the assignment. All output must line up in

columns as shown.

update $-$ update running totals to be used in the summary function. Specifically, add $1$ to

the number of cities, add this city's livability to a total livability and determine if this city's

livability is the best so far by comparing it to the previous best city's livability. If this is the best so far, remember both this city's livability and its name. To remember the name,

copy this city's name $($a string$)$ into a string to store the best city's name. This should be

done using strcpy from string.h$.$ The instruction is strcpy$($destination$,$

source$)$; where destination and source are the two string variables. As multiple

variables are being updated, this function must return the changed $($or possibly changed$)$

values through the parameter list.

summary $-$ compute the average livability rating $($total livability $/$ number of cities$)$ and

output the number of cities, the average livability and the city with the highest livability

along with its livability value.

Recall in program #$1,$ you controlled your loop using while $(($c$=$getc $($fp$))!=$EOF$).$ In this

assignment, you will control your while loop in the same way but rather than calling getc, you

will call your own input function. That function will return the result of fscanf, which itself will

be the number of inputs. This value is EOF if you have reached the end of the file. From main's

while loop, the code looks like while $($input $(..)!=$EOF$)\{dots\}$ where $...$ is the parameter

list. You will have to figure out how to pass these parameters. One of the parameters will be your

FILE $*$ variable.The while loop's body will contain all of your function calls to the various computation functions,output and update. DO NOT include any other code in the loop body