Simple Student Grade Calculato

This is a basic C++ console application that calculates the average grade of a student based on marks entered for different subjects.

The program asks the user to enter their name and marks for 3 subjects, calculates the average, and displays the result along with a simple grade classification (A, B, C, etc.).

It is a great beginner-level project to practice input/output, variables, and conditional statements in C++.