#include <iostream>
#include <vector>
#include <iomanip>
#include <string>
using namespace std;

int main() {
	vector<string> names;
	vector<double> grades;
	int numStudents;
	int sum = 0.0
		cout << "Welcome to the Student roster" << endl;
	double average = 0.0;
	double grade = 0.0;
	string fullName;
	string firstName;
	string lastName;
	char selection;

	cout << "Welcome to the student roster! ";
	cout << "How many students are in your class?: ";
	cin >> numStudents;
	//Read in Student Info
	for (int i = 0; i < numStudents; ++i) {
		cout << "Please enter student (First Last Grade) info: ";
		cin >> firstName >> lastName >> grade;
		fullName = firstName + " " + lastName;
		names.push_back(fullName);
		grades.push_back(grade);
	}

	bool loop = true
	//Print Menu and Thanks
		cout << "Thank you for entering your students information! " << endl;
	cout << "Please choose one of the following options:" << endl
		<< "a: add a Student" << endl
		<< "r: remove a Student" << endl
		<< "p: print the class summary" << endl
		<< "m: print menu" << endl
		<< "q: quit program" << endl;

		//Read in Initial Selection
	while (selection != 'q') {

		char = "selection " {};
		cout << "Selection: ";
		cin >> selection;
		switch (selection) {

		//Handle Add Student
			case 'a':
				{
					cout << "Please enter student (First Last Grade) info: ";
					cin >> firstName >> lastName >> grade;
					fullName = firstName + " " + lastName;
					names.push_back(fullName);
					grades.push_back(grade);
					break;
				}
				//Handle Remove Student
			case'r':
				{
				//Ask the user what the students name is
					cout << "\nPlease enter student (First Last ) info for remove: ";
					cin >> firstName >> lastName;
					fullName = firstName + " " + lastName;
					for (int i = 0; i < names.size(); i++) {
						if (names.at(i) == fullName) {
							names.erase(names.begin() + i);
							grades.erase(grades.begin() + i);
							break;
						}
					}
					//Print class summary
			case 'p':
				{
					cout << "\nClass Summary " << endl;
					cout << "------------------------------ " << endl;
					cout << "Name " << "\t\t" << "Games\n ";
					cout << "-------- ------------- -------- " << endl;
					cout << left << setw(20) << "Name";
					cout << right << setw(10) << fixed << "Grade" << endl;
					cout << left << setw(20) << "--------------";
					cout << right << setw(13) << "--------" << endl;
					for (int i = 0; i < names.size(); i++) {

						double average = 0.0;
						double grades = 0.0;
						cout << left << setw(20) << names.at(i);
						cout << right << setw(10) << fixed << setprecision(2) << grades.at(i) << endl;
						cout << names.at(i) << setw(20) << grades.at(i) << endl;
						sum += grades.at(i);
					}
					average = average / names.size();
					cout << "Number of students\n: " << endl;
					cout << "------------------- " << endl;
					cout << names.size() << endl;

					cout << "Average Grade: " << endl;
					cout << "-------------- " << endl;
					cout << average << endl;

					break;
				}
				// display print menu
				case 'm'
				{
					cout << "Please choose one of the following options:\n ";
					cout << "a: add a Student\n ";
					cout << "r: remove a Student\n ";
					cout << "p: print the class summary\n ";
					cout << "m: print menu\n ";
					cout << "q: quit program\n " << endl;

					break;
				}
				case 'q':
					{
						loop = false;
						break;
					}
				default:
					cout << "Not a valid selection\n";
				}
		}
		return 0;
	}
]

#include <iostream>
#include <vector>
#include <iomanip>
#include <string>
using namespace std;

void menu() {
	cout << "Please choose one of the following options:\n"
		<< "a: add a Student\n"
		<< "r: remove a Student\n"
		<< "p: print the class summary\n"
		<< "m: print menu\n"
		<< "q: quit program\n";
}

int main() {
	vector<string> names;
	vector<double> grades;
	int numStudents {};
	double grade {};
	string firstName;
	string lastName;
	char selection {};

	cout << "Welcome to the student roster! ";
	cout << "How many students are in your class?: ";
	cin >> numStudents;

	for (int i {}; i < numStudents; ++i) {
		cout << "Please enter student (First Last Grade) info: ";
		cin >> firstName >> lastName >> grade;
		names.push_back(firstName + " " + lastName);
		grades.push_back(grade);
	}

	cout << "Thank you for entering your students information!\n";
	menu();

	while (selection != 'q') {
		cout << "Selection: ";
		cin >> selection;

		switch (selection) {
			case 'a':
				{
					cout << "Please enter student (First Last Grade) info: ";
					cin >> firstName >> lastName >> grade;
					names.push_back(firstName + " " + lastName);
					grades.push_back(grade);
				}
				break;

			case'r':
				{
					cout << "\nPlease enter student (First Last ) info for remove: ";
					cin >> firstName >> lastName;

					const auto fullName { firstName + " " + lastName };

					for (size_t i {}; i < names.size(); ++i)
						if (names[i] == fullName) {
							names.erase(names.begin() + i);
							grades.erase(grades.begin() + i);
							break;
						}
				}
				std::cout << "Name not found\n";
				break;

			case 'p':
				{
					double sum {};

					cout << "\nClass Summary\n";
					cout << "------------------------------\n";
					cout << left << setw(20) << "Name";
					cout << right << setw(10) << fixed << "Grade\n";
					cout << left << setw(20) << "--------------";
					cout << right << setw(13) << "--------\n";

					for (size_t i {}; i < names.size(); ++i) {
						cout << left << setw(20) << names[i];
						cout << right << setw(10) << fixed << setprecision(2) << grades[i] << '\n';
						//cout << names[i] << setw(20) << grades[i] << '\n';
						sum += grades[i];
					}

					cout << "Number of students:\n";
					cout << "-------------------\n";
					cout << names.size() << '\n';

					cout << "Average Grade:\n";
					cout << "--------------\n";
					cout << sum / names.size() << '\n';
				}
				break;

			case 'm':
				menu();
				break;

			case 'q':
				//loop = false;
				break;

			default:
				cout << "Not a valid selection\n";
				break;
		}
	}
}