The Objective

The objective of this assignment is to give you practice with project and function design. It will also give you an opportunity to work with reading information from a file, structures, an array of structures, passing by reference, and some formatted printing.

The Background

I have been planning my summer vacation and have decided to visit some of the New England states, south-eastern Canada and Niagra Falls by taking a circular route. I have been using mapquest.com and yahoo.com to find out information about the places I'd like to visit and to find out how many miles I'll have to drive between each of these places and the expected driving time between each site.

I have been putting the information that I've collected into a data file called p3places.dat, but it is not in the form that I'd like to see. The first two entries in the file are the starting location's city and state:
Baltimore
MD
After that, the file contains the following fields for each site:
destination city
destination state
miles between the previous location and this one (mileage of this leg)
driving time, which is the elapsed time in minutes

You can view the p3places.dat file to examine its contents and see its format.

You should copy this file into your account by using the following command:
cp /afs/umbc.edu/users/s/b/sbogar1/pub/cs201/P3Data/p3places.dat .

The Task

Design and code a project that will allow you to read in the information from the p3places.dat file, manipulate it to be in the desired form, and produce a chart that looks like the one shown below:

The Specifications

• You must use the following structure definition and typedef:
  typedef struct leg { char originCity[MAXCITYNAME]; char originState[MAXSTATE]; char destinCity[MAXCITYNAME]; char destinState[MAXSTATE]; float miles; float kilometers; int hours; int minutes; }LEG; where MAXCITYNAME has been defined to be 15 and MAXSTATE has been defined to be 3.
• You will store the information that you get from the file into an array of LEGs, where each element of the array will hold the information for one leg of the journey. The array size should be 25.
• You must ask the user to enter the name of the data file to be used and you must allow that filename to be as much as 30 characters long.
• The kilometers must be computed from the miles given in the file. There are 1.609 kilometers per mile.
• The file has the driving time in elapsed minutes. You may use the ConvertTimeToHM() function from Lecture #13 without citing your source, to convert this time to the hours and minutes that are to be stored in the LEG.
• You must have a function called FindTotals() and it must have the following prototype:
  void FindTotals (LEG places[], int numPlaces, float* pMiles, float* pKilometers, int* pHours, int* pMinutes); where pMiles, pKilometers, PHours, and pMinutes are pointers to the miles, kilometers, hours and minutes variables in the calling function. This function should total all of the miles, kilometers, hours and minutes for all of the legs of the journey.
• Be aware that the total minutes will probably be more than one hour, so you should adjust the values of hours and minutes of that total so that the minutes shown in the total will be less than 60.
• Since we have not covered pointers to pointers in much detail yet, you are NOT required to have a function called OpenFile(). You may open the file in main() and then pass the FILE* to the function that reads from the file. Don't forget to close the file as soon as you have finished reading from it. Also, you do not have to use dynamic memory allocation for the array of LEGs, you can just declare it.
• You must produce a table using formatted printing (discussed in Chapter 9) to make your table look similar to mine, shown both above in the description and below in the sample output. You must have the same aligned columns of information as shown. Miles and kilometers must be aligned by their decimal points as shown. Your spacing of the columns may be different. Make your table fit in an 80-character wide screen.

Sample Run

Submitting the Program

You are to use seperate compilation for this project, so you will be submitting a minimum of three files.
Your C source code file that contains main() MUST be called proj3.c. I would expect that you would also have files called trip.c and trip.h, but you may choose to have additional .c and .h files.

To submit your project, type the following at the Unix prompt. Note that the project name starts with uppercase 'P'.

submit cs201 Proj3 proj3.c trip.c trip.h (and possibly other files, seperated by spaces)

To verify that your project was submitted, you can execute the following command at the Unix prompt. It will show all files that you submitted in a format similar to the Unix 'ls' command.

submitls cs201 Proj3

Monday, 30-Oct-2000 14:53:34 EST