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Gradebook Program Help?

Physiccx (4)
I'm trying to make a program that'll add students and their ID's as well as courses. I'm stuck on the part of putting students into courses. I was thinking of using a 2D Array of strings but I don't know how to approach it. Any help would be appreciated. Here's my code.
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#include <string>
#include <cstring>
#include <iostream>
#include <cstdlib>
using namespace std;

const int max_students = 25;
const int max_courses = 10;

int main()
{

	string courses[max_courses]; //Array of strings for the courses
	string course_id[max_courses]; //Array of strings for the course id
	string student[max_students]; //Array of strings for the student names
	string student_id[max_students]; //Array of strings for the students id
	string major[max_students]; //Array of strings for the student majors
	string addstutocourse[100][10] = {}; //2D array to store students to courses

	int choice = 0;
	
	



	do //Loop to keep the decision going if you need to repick
	{
		cout << "Please make a decision..." << endl;
		cout << "1.) Add course. " << endl;
		cout << "2.) Add student. " << endl;
		cout << "3.) Add student to course. " << endl;
		cout << "4.) Add grades for student in a course. " << endl;
		cout << "5.) Show all courses. " << endl;
		cout << "6.) Show all students. " << endl;
		cout << "7.) Show all students in a course. " << endl;
		cout << "8.) Find the average for a student. " << endl;
		cout << "9.) Quit. " << endl;
		cin >> choice;
		/*switch statement for every situation you pick.*/
		
		switch (choice) 
		{
			case 1: 
				int i;
				cout << "How many courses have you entered so far? (i.e. if you haven't entered a course yet, then you've entered 0 courses.)" << endl;
				cin >> i; //Sets the beginning of the array 
				if(i >= max_courses) //Checks to see if there are already the maximum number of classes inputted. (10 is the max)
				{
					cout << "I'm sorry, but you've already entered too many courses. Shutting down..." << endl;
					return 0;
				}
				cout << "Whats the name of the course?" << endl;
				cin.ignore();
				getline(cin, courses[i]); //Uses the array of the courses
				cout << "Whats the ID number of the course?" << endl;
				cin >> course_id[i];
				cout << "Course " << courses[i] << " " << course_id[i] << " was added!" << endl;
			break;
			case 2:
				int student_num;
				cout << "How many students have you entered so far? (If none then please select 0)" << endl;
				cin >> student_num;
				if(i >= max_students)
				{
					cout << "I'm sorry but you've already entered too many students. Shutting down..." << endl;
					return 0;
				}
				cout << "What's the student's last name?" << endl;
				cin >> student[student_num];
				cout << "What's the student's ID number?" << endl;
				cin >> student_id[student_num];
				cout << "What's the student's major? (i.e. CSCE, English, Math.)" << endl;
				cin >> major[student_num];
				cout << "Student has been added!" << endl;
			break;
			case 3:
				
			break;
			case 4:;
			break;
			case 5:
				cout << "All the courses entered so far." << endl;
				for(int i = 0; i < 10; i++)
				{
					cout << courses[i] << " " << course_id[i] << endl;
				}
			break;
			case 6:
				cout << "All students entered so far along with their majors." << endl;
				for(int i = 0; i < 25; i++)
				{
					cout << student[i] << " " << student_id[i] << " " << major[i] << endl;
				}
			break;
			case 7:;
			break;
			case 8:;
			break;
		};
	}while (choice != 9); //quits the loop

	return 0;
}
Last edited on
theturk1234 (148)
Ok,
Make a string array of all possible courses to take. In each Student, have a string array that contains the name of the courses that they are enrolled in. Then add a AddCourse() function to the Student class.
You should be all set.
Good luck!
Physiccx (4)
okay guys I got it to added students to a course and show how many are in the course. i'm having trouble with the grades. here is my updated code. Please help ?

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#include <string> 
#include <cstring>
#include <iostream>
#include <cstdlib>
using namespace std;

const int max_students = 25; //Global constant to display the max students
const int max_courses = 10;  //Global constant to display max courses

int main()
{
	
	string courses[max_courses]; //Array of strings for the courses
	string course_id[max_courses]; //Array of strings for the course id
	string student[max_students]; //Array of strings for the student names
	string student_id[max_students]; //Array of strings for the students id
	string major[max_students]; //Array of strings for the student majors
	string addstutocourse[max_courses][11]; //2D array to store students with their courses
	int grades[5]; //1D array for grades for each course

	int choice = 0;
	
	



	do //Loop to keep the decision going if you need to repick
	{
		cout << "Please make a decision..." << endl;
		cout << "1.) Add course. " << endl;
		cout << "2.) Add student. " << endl;
		cout << "3.) Add student to course. " << endl;
		cout << "4.) Add grades for student in a course. " << endl;
		cout << "5.) Show all courses. " << endl;
		cout << "6.) Show all students. " << endl;
		cout << "7.) Show all students in a course. " << endl;
		cout << "8.) Find the average for a student. " << endl;
		cout << "9.) Quit. " << endl;
		cin >> choice;
		/*switch statement for every situation you pick.*/
		
		switch (choice) 
		{
			case 1: 
			{
				int i;
				cout << "How many courses have you entered so far? (i.e. if you haven't entered a course yet, then you've entered 0 courses.)" << endl;
				cin >> i; //Sets the beginning of the array 
				if(i >= max_courses) //Checks to see if there are already the maximum number of classes inputted. (10 is the max)
				{
					cout << "I'm sorry, but you've already entered too many courses. Shutting down..." << endl;
					return 0;
				}
				cout << "Whats the name of the course?" << endl;
				cin.ignore();
				getline(cin, courses[i]); //Uses the array of the courses
				cout << "Whats the ID number of the course?" << endl;
				cin >> course_id[i];
				addstutocourse[i][0] = courses[i]; //Adds the course to the full roster for students
				cout << "Course " << courses[i] << " " << course_id[i] << " was added!" << endl; //Displays a confirmation message
			}
			break;
			case 2:
			{
				int student_num; //Number of students so far
				cout << "How many students have you entered so far? (If none then please select 0)" << endl;
				cin >> student_num; //Enter the amount of students you've entered so far
				if(student_num >= max_students) //Checks to see if you already added the max number of students
				{
					cout << "I'm sorry but you've already entered too many students. Shutting down..." << endl;
					return 0; //Will shut down the program
				}
				cout << "What's the student's last name?" << endl; //Grabs the student's name
				cin >> student[student_num];
				cout << "What's the student's ID number?" << endl; //Grab the student's ID number
				cin >> student_id[student_num];
				cout << "What's the student's major? (i.e. CSCE, English, Math.)" << endl; //Grab the student's major
				cin >> major[student_num];
				cout << "Student " << student[student_num] << " " << student_id[student_num] << " " << major[student_num] << " has been added!" << endl; //Confirmation message
			}
			break;
			case 3:
			{
				string name; //Ask for the student name
				string cname; //Ask for the course name
				cout << "Student name: ";
				cin >> name;
				for (int x = 0; x < max_students; x++) //For loop to go through array to see if there is a student with this name already
				{
						if(student[x] == name)
						{
							cout << "Which course would you like to add " << student[x] << " too?" << endl;
							cin.ignore();
							getline(cin, cname);
							for(int y = 0; y < max_courses; y++) //For loop to go through the courses to see if this course has been added already
							{
								if(courses[y] == cname) //If the course is there then this will add the student
								{
									int num;
									cout << "How many students do you have in " << courses[y] << "?" << endl;
									cin >> num;
									addstutocourse[y][num + 1] = name;
									cout << "Process complete!" << endl;
									
								}
							}
						}
				}
			}
			break;
			case 4:
			/*{
				string stu_name;
				cout << "Which student would you like to see the grades of?" << endl;
				cin >> stu_name;
				for (int a = 0; a < max_students; a++)
				{
					if(student[a] == stu_name)
					{
						cout << "Which course would you like to see the grades for?" << endl;
						string cour_name;
						for (int b = 0; b < max_courses; b++)
						{
							if(courses[b] == cour_name)
							{
								
							}
						}
					}
				}
			}*/;
			break;
			case 5:
			{
				cout << "All the courses entered so far." << endl;
				for(int i = 0; i < 10; i++) //A for loop to display all of the courses you've added along with their ID numbers
				{
					cout << courses[i] << " " << course_id[i] << endl;
				}
			}
			break;
			case 6:
			{
				cout << "All students entered so far along with their majors." << endl;
				for(int i = 0; i < 25; i++) // A for loop to display all student names along with their majors
				{
					cout << student[i] << " " << student_id[i] << " " << major[i] << endl;
				}
			}
			break;
			case 7:
			{
				string see_course; //String variable to see which course you would like to see the roster of.
				cout << "Which course would you like to see?" << endl;
				cin.ignore();
				getline(cin, see_course); //Gets the line of the course you entered
				for (int m = 0; m < max_courses; m++) //For loop to find the course that was entered to see the roster of
					if(courses[m] == see_course)
					{
						for (int n = 1; n < 11; n++) //For loop to display the roster of the course
						{
							cout << "Roster for " << endl;
							cout << addstutocourse[m][n] << endl;
						}
					}
			}
			break;
			case 8:;
			break;
		};
	}while (choice != 9); //Quits the loop

	return 0;
}
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