calculating the index of an array C#
- by Kerry G
I want to display a list of the answers a student entered incorrectly. How do I identify the index of these questions?
I am hoping to change the contents of a textbox to a list of the questions
answered incorrectly, which would require calculating the index of each
incorrect question.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace WindowsFormsApplication5
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
//return a pass/fail
//return number of correct answers
//return number of incorrect answers
//return index figures of incorrect values
public void examResults ()
{
string[] correctAnswers = {B,D,A,A,C,A,B,A,C,D,B,C,D,A,D,C,C,B,D,A};
string[] studentResults = File.ReadAllLines("studentResults.txt");
var c = correctAnswers.Where((x, i) => x.Equals(studentResults[i])).Count();
if ( c <= 14)
passFailBox.Text = "Student has failed the exam";
else
passFailBox.Text = "Student has passed the exam";
numberCorrectBox.Text = "Student has answered" + c + "answers correctly";
int f;
f= 21-c;
numberIncorrectBox.Text = "Student has answered" + f + "answers incorrectly";
}
}
}
