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CoursePlanner.cpp

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+/*
+	* Vector-based Course Tool
+	* Author: Cody Cook
+	* Date: 2023/08/10
+	* Southern New Hampshire University
+	* CS-300-J7303 DSA: Analysis and Design 23EW6
+*/
+
+#include <iostream>
+#include <fstream>
+#include <vector>
+#include <sstream>
+
+using namespace std;
+
+// build a Course struct
+struct Course {
+	string courseNumber;
+	string title;
+	vector<string> prerequisites;
+};
+
+// global variables
+vector<Course> courses;
+
+// functions
+
+// function to display a course
+void displayCourse(const Course& c) {
+
+	// if courseNumber is empty, let's just skip it
+	if (c.courseNumber.empty()) {
+		return;
+	}
+
+	// display the course number and course title
+	cout << "Course Number: " << c.courseNumber << endl;
+	cout << "Course Title: " << c.title << endl;
+
+	// display prereqs
+	cout << "Course Prerequisites: ";
+
+	// if there are no prerequisites, print "None"
+	if (c.prerequisites.size() == 0) {
+		cout << "None";
+	}
+	else {
+		for (const auto& prereq : c.prerequisites) {
+			// if this is the last prerequisite, don't print the comma
+			if (prereq != c.prerequisites.back()) {
+				cout << prereq << ", ";
+			}
+			else {
+				cout << prereq;
+			}
+		}
+	}
+	cout << endl << endl;
+}
+
+// Function to get course info from the user
+Course getCourse() {
+	string getCourseNumber;
+
+	// Default "empty" course to return in case of an error or if not found
+	Course emptyCourse;
+
+	if (courses.size() == 0) {
+		cout << "\nCourses are not currently loaded. Please load courses.\n\n";
+		return emptyCourse;
+	}
+	else {
+
+		cout << "Enter course number: ";
+		cin >> getCourseNumber;
+		cout << endl;
+
+		for (unsigned int i = 0; i < courses.size(); i++) {
+			if (courses[i].courseNumber == getCourseNumber) {
+				return courses[i];
+			}
+		}
+
+		// if we didn't return already, then
+		// the course wasn't found
+		cout << "Course not found.";
+		cout << "\n\n";
+	}
+	return emptyCourse;
+}
+
+// Selection sort function for the vector sorting
+void selectionSortCourses(vector<Course>& courses) {
+	// Get the total number of courses
+	int n = courses.size();
+
+	// Traverse through all courses in the vector
+	for (int i = 0; i < n - 1; i++) {
+		// Assume the current index holds the smallest courseNumber
+		int min_idx = i;
+
+		// Traverse the vector from the element next to i up to the end
+		for (int j = i + 1; j < n; j++) {
+			// If a smaller courseNumber is found, update min_idx
+			if (courses[j].courseNumber < courses[min_idx].courseNumber) {
+				min_idx = j;
+			}
+		}
+		// Swap the found minimum course with the course at current index 'i'
+		swap(courses[i], courses[min_idx]);
+	}
+}
+
+// Function to load courses from a CSV file
+void loadCourses() {
+	string filePath;
+	string line;
+
+	// empty courses for a fresh import
+	courses.clear();
+
+	// prompt user for the path
+	cout << "\nEnter the Courses csv file (Default: courses.csv): ";
+
+	// clear the newline left in the buffer from previous inputs
+	// we will get the whole link for an absolute path; relative works, too.
+	cin.ignore();
+	getline(cin, filePath);
+	cout << endl;
+
+	if (filePath.front() == '\"' && filePath.back() == '\"') {
+		filePath = filePath.substr(1, filePath.length() - 2);
+	}
+
+	// open the file for reading
+	ifstream file(filePath);
+
+	// if we didn't open the file
+	if (!file.is_open()) {
+		cout << "Error opening file: " << filePath << endl << endl;
+		// error
+		return;
+	}
+
+	// while we go through each line
+	while (getline(file, line)) {
+		stringstream ss(line);
+		Course c;
+		getline(ss, c.courseNumber, ',');
+		getline(ss, c.title, ',');
+		string prereq;
+		while (getline(ss, prereq, ',')) {
+			c.prerequisites.push_back(prereq);
+		}
+		courses.push_back(c);
+	}
+
+	// sort the courses
+	selectionSortCourses(courses);
+}
+
+
+void menu() {
+	int menuOption = 0;
+
+	while (menuOption != 9) {
+		// display the menu options
+		cout << "1. Load Data Structure\n";
+		cout << "2. Print Course List\n";
+		cout << "3. Print Course\n";
+		cout << "9. Exit\n\n";
+
+		// ask the user to select an option
+		cout << "What would you like to do? ";
+		cin >> menuOption;
+
+		// check if cin failed
+		if (cin.fail()) {
+
+			// clear the error state
+			cin.clear();
+
+			// remove the erroneous input from the stream
+			cin.ignore(INT_MAX, '\n');
+			cout << "Please enter a valid number." << endl << endl;
+
+			// skip the rest of the loop iteration
+			continue;
+		}
+
+		// process the user's input
+		switch (menuOption) {
+		case 1:
+			// load data structure
+			loadCourses();
+			break;
+		case 2:
+			
+			// print course list
+			if (courses.size() == 0) {
+				cout << "\nCourses are not currently loaded. Please load courses.\n\n";
+			}
+			else {
+				for (unsigned int i = 0; i < courses.size(); i++) {
+					// show each course
+					displayCourse(courses[i]);
+				}
+			}
+			break;
+		case 3:
+		{
+			// get the course
+			Course c = getCourse();
+
+			// show the course details
+			displayCourse(c);
+		}
+		break;
+		case 9:
+			// we're just going to edit next loop
+			break;
+		default:
+			// no valid options
+			cout << "Invalid option. Please try again." << endl;
+			break;
+		}
+	}
+}
+
+int main() {
+	// greet the user
+	cout << "Welcome to the course planner.\n\n";
+
+	// display the menu
+	menu();
+
+	// salutate the user
+	cout << "Thank you for using the course planner!\n\n";
+
+	// exit the program
+	return 0;
+}
+

courses.csv

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+MATH201,Discrete Mathematics
+CSCI300,Introduction to Algorithms,CSCI200,MATH201
+CSCI350,Operating Systems,CSCI300
+CSCI101,Introduction to Programming in C++,CSCI100
+CSCI100,Introduction to Computer Science
+CSCI301,Advanced Programming in C++,CSCI101
+CSCI400,Large Software Development,CSCI301,CSCI350
+CSCI200,Data Structures,CSCI101