🎓 Student Management System

A console-based student management system built with C++ and STL containers for efficient data handling and academic record keeping.

📋 Description

This program simulates a university student management system with comprehensive CRUD operations, grade tracking, and statistical analysis. It demonstrates practical usage of C++ STL containers and algorithms.

🎯 Features

Student Management

• ✅ Add new students with personal information
• ✅ Remove students by ID
• ✅ Search students by ID or name
• ✅ Display all students
• ✅ Filter students by faculty

Grade Management

• ✅ Add grades for specific subjects
• ✅ View all grades for a student
• ✅ Calculate average grade across all subjects
• ✅ Support for multiple subjects per student

Statistics & Analytics

• ✅ Top 5 Students — ranked by average grade
• ✅ Faculty Statistics — student count per faculty
• ✅ Popular Subjects — most studied subjects
• ✅ Excellent Students — students with average ≥ 90

Data Persistence

• ✅ Save all data to CSV file
• ✅ Load data from CSV file
• ✅ Automatic data validation

🛠️ Technologies

• C++11 (STL containers, algorithms, lambda functions)
• Data Structures:
  • std::map<int, Student> — fast student lookup by ID
  • std::map<string, vector<int>> — grades organized by subject
  • std::vector — dynamic arrays for collections
  • std::pair — for ranked data (ID + grade)
• Algorithms:
  • std::sort with custom comparators
  • std::accumulate for grade calculations
  • std::find_if for conditional search
• File I/O: CSV format for data persistence

🚀 How to Run

Compilation (Visual Studio):

1. Open the project in Visual Studio
2. Press F5 (Run)

Compilation (GCC/Clang):

g++ -std=c++11 main.cpp Menu.cpp StudentSystem.cpp -o student_system
./student_system

Compilation (CMake):

mkdir build && cd build
cmake ..
make
./student_system

📂 Project Structure

student-management-system/
├── main.cpp              # Entry point
├── Student.h             # Student structure with operator overloads
├── StudentSystem.h       # Core system interface
├── StudentSystem.cpp     # Implementation of all features
├── Menu.h                # Menu interface
├── Menu.cpp              # Interactive console menu
├── README.md             # This file
├── Students.txt          # Sample data file (generated)
└── screenshots/
    └── demo.gif

💾 Data Format

The system uses CSV format for data storage:

# Students
1,John Smith,20,Computer Science
2,Alice Brown,19,Physics

# Grades
1,Math,85,90,95
1,Programming,92,88
2,Math,92,88,90

🎓 What I Learned

STL Containers & Data Structures:

• Working with std::map for associative arrays
• Nested containers (map<string, vector<int>>)
• Efficient data lookup and manipulation
• Iterator patterns and best practices

Algorithms & Functional Programming:

• Custom sorting with lambda comparators
• Aggregate operations with std::accumulate
• Conditional filtering and searching
• Function overloading for flexible interfaces

Software Design:

• Separation of concerns (Menu, System, Data)
• Exception handling for error management
• File I/O with proper error checking
• CRUD operations implementation

Real-World Skills:

• Menu-driven application architecture
• Data persistence and validation
• User input handling and validation
• Statistical calculations and ranking

📋 Example Usage

=== STUDENT MANAGEMENT SYSTEM ===

1. Add Student
Enter choice: 1

--- Add Student ---
Name: John Smith
Age: 20
Faculty: Computer Science

--- Add Grade ---
Student ID: 1
Subject: Math
Grade: 92

--- Calculate Average ---
Student ID: 1
Average grade: 92.00

--- Top 5 Students ---
1. Student [1] have grade: 95.5
2. Student [3] have grade: 92.3
...

🔧 Future Improvements

• Export statistics to JSON/XML
• GUI version using Qt or ImGui
• Unit tests with Google Test
• Database integration (SQLite)
• Multi-user support with authentication
• Grade history and trends
• Attendance tracking

📝 License

MIT License — free to use and modify.

👤 Author

Oleksandr Kopii
GitHub: @SamuraiSanch

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