Computing Structures Project 1 Solution

Objective:
In this project you will learn to create classes and read in data from an input file using redirected input. You will also learn about the graph data structure and graph databases.

Description:
A graph data structure consists of a set of nodes connected using a set of edges. Mathematically represented in graph theory as G = (V, E) where V is the vertex/node set and E is the edge set. One edge connects exactly two nodes that are in the graph.
Below is an example of a graph where each node consists of a node number and a string/name as well. The edges that are connecting these nodes also have a string attached to each of them. The string in the edge represents the relationship between the two nodes that are being connected.



You are required to write all the methods that are given in the boilerplate code.

Input explanation:
The input file given is the in the following format:

4
4

0 Jack 1 Tom
2 Anna
3 Beth

I 0 1 friend
I 0 2 boss
I 2 3 friend
R 0 1
D
E 0 2
…


The input file starts with the number of nodes (4) that are given followed by the maximum number of edges (4). Then we list all the nodes that consists of the node number and the corresponding string.
After this, we give you a list of commands/options that go till the end of the input file. The commands can either be I, R, D or E:
• I – the insert edge command is followed by the two nodes numbers it is connecting along with the edgeInfo.
• R – the remove edge command is followed by the edge we want to remove represented by the two nodes the edge is connecting.
• D – the display command displays the nodes and edges that are currently in the data structure in the specified format (sample output file).
• E – this operation asks if there exists an edge between the given two nodes.


Class definition:
A boiler plate source file has been provided along with this project specification. The class definition and a main function have also been given with comments to get you started with the project.

A sample output file will be provided (in the next few days) for the given corresponding input file. Your output is supposed to exactly be the same as this output. You need to essentially follow this format of the output. This is necessary for your program to pass the autograder.

Redirected input:
Redirected input provides you a way to send a file to the standard input of a program without typing it using the keyboard. To use redirected input in Visual Studio environment (on windows), follow these steps: After you have opened or created a new project, on the menu go to project, project properties, expand configuration properties until you see Debugging, on the right you will see a set of options, and in the command arguments type <“input filename”. The < sign is for redirected input and the input filename is the name of the input file (including the path if not in the working directory).

g++ project1.cpp -o p1

./p1 < input1.txt

Make sure your program and your input file are in the same folder.

A simple program that reads the input file and displays everything that was read is given below.

#include <iostream>

using namespace std;

int main ()
{ int numNodes, maxEdges;

cin >> numNodes >> maxEdges;
cout << numNodes << maxEdges;

return 0;
}


Submission:
Submission will be through GradeScope. Your program will be autograded with test cases and then hand graded to check for documentation and if you have followed the specifications given.

Your final submission must contain your source file named project1.cpp. You access GradeScope using the tab on the left in our course page on canvas.

Sample output file for corresponding input files will be released. The input1.txt file given is a simple input file that will help you understand the project, more complicated ones will be released later and used for grading.

Constraints:
1. In this project, the only header you will use the header files that are given to you in the boiler plate code. Using other or excess header files will be subject to a heavy grade penalty for the project.
• Please review academic integrity policies in the modules.

How to ask for help:
1. Check FAQ discussion board of the project first.
3. Upload your well commented program to CodePost.
a. This is a website which is used to share code.
b. You will upload your program and I can view it and comment on it.
c. Here is the invite link to our class for the summer.
d. Once you join the class on CodePost, you can upload your program to the Project 1 assignment.
Note: Your program will not be auto graded at CodePost, this is just for when you want to ask a question and a place where I can look at your program and comment on it. CodePost is great for live feedback. GradeScope is the place where you should submit and where your program will be autograded.