You will write a simple program to track ship movement over
time. You are provided with the struct
Point defined in
dbpoint.cpp. You can use this point struct to help track a ship’s position.
Your program will read information from the user for a single boat. Specifically, you will be given its name, position (as an (x,y) pair giving its position in nautical miles from some fixed point), its heading (in degrees from north) and its speed in knots. In this scenario, the boat never changes speed or heading once set by the user. Your program will then read a number of hours from the user, update the boat's position, and print a position report after that number of hours. It will keep reading a number of hours and printing a position report over and over until the user indicates that he or she wants to quit by entering a -1. Below is a sample run of the program (user input shown in red). NOTE: several hints are given below!!!!!
Enter boat info: Slowpoke (140.3,33.7) 37.0 degrees 10 kts
Currently: Slowpoke (140.3,33.7) 37 degrees 10 kts
Time elapsed in hours: 0.5
Currently: Slowpoke (143.309,37.6932) 37 degrees 10 kts
Time elapsed in hours: 2.5
Currently: Slowpoke (158.354,57.6591) 37 degrees 10 kts
Time elapsed in hours: -1
You must make a struct
Boat that stores all the necessary information about a
boat, and make all the work (like reading and writing and moving the boat) into
functions. There should be a file
Boat.cpp that implements all of
this stuff. Your
should be very simple, and should include
(but not Boat.cpp).
If you do this right, it should be trivial to transform this program so that it
would track many boats simultaneously!
In: A screen capture of your program running on the given sample input,
and a printout of
1. You will first want to add dbpoint.h and dbpoint.cpp to your Visual Studio project. When making a .h file from scratch, select “C/C++ Header File” instead of “C++ Source File.”
boat.h file should have this at the very top:
and this at the very bottom:
See class 35 for details on this.
3. Remember that a compile error at, say main.cpp line 12, may actually be caused by something in another file that was included. For instance, did you forget a semicolon somewhere in boat.h? (this can cause obscure errors in main.cpp)
4. Consider how the following function might help you. You are free to use it or you may create your own from scratch.
Point move(Point position, double heading, double speed, double time)
double PI = 3.14159;
Point delta; // the displacement of the boat over the specified time
delta.x = time*speed*sin(heading*PI/180); // displacement in x direction
delta.y = time*speed*cos(heading*PI/180); // displacement in y direction
return position + delta; // requires overload of operator+ for struct Point