using System;

using System.Windows.Forms;

​

namespace StudentGradeApplication

{

    public partial class frmStudentGradeProgram : Form

    {

        public frmStudentGradeProgram()

        {

            InitializeComponent();

        }

​

        private void btnCalculate_Click(object sender, EventArgs e)

        {

            // Validate input

            if (string.IsNullOrWhiteSpace(txtName.Text))

            {

                MessageBox.Show("Please enter the student's name.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);

                return;

            }

​

            if (!double.TryParse(txtSubject1.Text, out double subject1) ||

                !double.TryParse(txtSubject2.Text, out double subject2) ||

                !double.TryParse(txtSubject3.Text, out double subject3) ||

                !double.TryParse(txtSubject4.Text, out double subject4) ||

                !double.TryParse(txtSubject5.Text, out double subject5))

            {

                MessageBox.Show("Please enter valid grades for all subjects.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);

                return;

            }

​

            // Calculate average grade

            double averageGrade = (subject1 + subject2 + subject3 + subject4 + subject5) / 5.0;

​

            // Determine pass or fail using ternary operator

            string result = averageGrade >= 75.00 ? "Passed" : "Failed";

​

            // Display result

            MessageBox.Show($"Student: {txtName.Text}\nAverage Grade: {averageGrade:F2}\nResult: {result}", "Result", MessageBoxButtons.OK, MessageBoxIcon.Information);

        }

    }

}