The Objective

The Background

On our trip, we kept track of our gas purchases and mileages so that we could see how many miles per gallon our car was getting. We found that our gas mileage varied quite a bit depending upon whether we were logging highway miles or were in slow traffic situations. The price of a gallon of gas varied quite a bit too. The highest price paid was on the New Jersey Turnpike. No surprise there. We also kept track of the amount of cash we were spending. We used cash for food, admission to museums and other attractions, souveniers, and miscellaneous items. We charged all of our hotels bills and gas purchases.

For this project, I would like you to use the information from the old trip to estimate the cost of the new trip.

The Task

• average mpg
• average cost per night for accomodations
• average amount of cash spent per day

Using the total number of miles for the entire trip, the miles per gallon that you've calculated from last summer's data and the current price of gasoline per gallon, you must calculate the total cost of the gasoline for the new trip. Using the average cost per night for accomodation that you've already found, and the number of nights planned for the new trip, you can calculate the cost of accomodations. Using the cash spent per day that you've found from last summer's trip, and the number of days expected for the new trip, you can calculate the total cash needed.

More details

• You must use the following structure definitions : typedef struct fill { int odometer; float gallons; float cost; int elapsedMiles; float mpg; float pricePerGal; }FILL; where the odometer reading, number of gallons purchased, and total cost of the fill are contained in the file. The elapsed miles, miles per gallon and price per gallon must be calculated. typedef struct hotel { char hotel[25]; char city[15]; char state[3]; int nights; float cost; float costPerNight; }HOTEL; where all data is found in the file except the cost per night, which must be calculated. typedef struct leg { char originCity[20]; char originState[3]; char destinCity[20]; char destinState[3]; int nights; int miles; }LEG; where all of the information is given in the file.

• You must prompt the user for the current price per gallon of unleaded regular gasoline (since that's the kind this car uses).

• You must read the information in from the gas.dat file and use it to fill an array of FILL structures. The first item in the file is the number of fills. You must use this number to dynamically allocate the memory needed to hold your array of structures. The next item in the file is the starting odometer reading. After that the data consists of the odometer reading, number of gallons, and the purchase price for each fill. (The other members of the structure must be calculated.)

  You must then generate a report about the gas mileages similar to the one shown in the sample output. It doesn't have to look exactly like the sample, but the numbers should agree and all of the same information needs to be shown.

• You must read the information from the hotels.dat file into an array of HOTELs. The first item in the file is the number of hotels in the file. You should use this number to dynamically allocate the space you need for this array of hotel structures. As mentioned earlier, you'll need to calculate the cost per night member of the structure from the information found in the file.

  You must generate a report about the hotels that contains all of the information shown in the sample output. Again, your report doesn't have to look exactly like mine, but the numbers should be the same.

• Next your program must read the information found in the newtrip.dat file into an array of LEGs. The first item in the file is the number of legs of the new trip. Space must be dynamically allocated for this array too. Each leg has an origin city and state and a destination city and state, the number of nights to be spent at the destination, and the number of miles for this leg of the trip.

  You must print a report, as in the sample output about the legs of the journey. Your output must be in a reasonable format although it need not look just like the sample.

• Next your program should calculate and report the estimated items for the new trip. (See the sample output)

The data files

The data files are gas.dat, hotels.dat, and newtrip.dat, which can be viewed from these links. You should NOT view it and save it into a file or cut and paste it from the browser into a file. Either of these methods of obtaining the file may cause there to be extraneous characters in the file that your program will try to read and disrupt the input of your data. Instead you must copy the files from my directory into the directory that you'll be using to work on this project.

Go to that directory and then issue the following commands exactly :

cp /afs/umbc.edu/users/s/b/sbogar1/pub/gas.dat .
cp /afs/umbc.edu/users/s/b/sbogar1/pub/hotels.dat .
cp /afs/umbc.edu/users/s/b/sbogar1/pub/newtrip.dat .

The space and the . (dot) at the end of each command are necessary and a part of the command.

Sample Output

Since the output file is large, instead of showing the output here, I am just providing a link to my output file, output

Although your output may look different than mine, you should print out the same information.

What to Turn In

You must use separate compilation for this project and should have a file, called proj3.c, that contains only the function main(). You should also have several other .c and .h files. I'll leave the naming of them to you.

Submit as follows:

submit cs201 Proj3 proj3.c (followed by any other .c & .h files you have)

The order in which the files are listed doesn't matter. However, you must make sure that all files necessary to compile your project are listed.