Answer to Question #3427 in C# for satish

Question #3427
Write a C# program which allows the user to enter student information and outputs the appropriate grade for the student. This assignment involves the use of classes, arrays or collections, loops and methods.
1
Expert's answer
2011-07-13T16:53:29-0400
Program.cs

using System;
using System.Collections.Generic;
using System.Text;

namespace Result
{
class Result
{
& private static int numberofStudent = 0;
& private static int key=0;
& private static List<Student> studentlist = new List<Student>();
& /// <summary>
& /// Calculate Grade of each student
& /// </summary>
& /// <param name="std"></param>
& private static void CalculateGrade(Student std){

if (std.getMark() >= 0 && std.getMark() < 50) {
std.setGrade("Fx");
}
if (std.getMark() >= 50 && std.getMark() < 60) {
std.setGrade("E");
}
if (std.getMark() >= 60 && std.getMark() < 70)
{
std.setGrade("D");
}
if (std.getMark() >= 70 && std.getMark() < 80)
{
std.setGrade("C");
}
if (std.getMark() >= 80 && std.getMark() < 90)
{
std.setGrade("B");
}
if (std.getMark() >= 90 && std.getMark() < 100)
{
std.setGrade("A");
}
& }
& static void Main(string[] args)
& {
try
{
Student st;
Console.WriteLine("Please enter number of student marks you would like to add");
numberofStudent = int.Parse(Console.ReadLine());


for (int i = 0; i < numberofStudent; i++)
{
& st = new Student();
& Console.WriteLine("Please enter name of student " + (i + 1).ToString());
& st.setName(Console.ReadLine());
& Console.WriteLine("Please enter mark for student " + (i + 1).ToString());
& st.setMark(Double.Parse(Console.ReadLine()));
& CalculateGrade(st);
& studentlist.Add(st);
}
string name="";
double mark = 0;
do
{
& Console.WriteLine("1. Display a Student Mark");
& Console.WriteLine("2. Change Student Mark");
& Console.WriteLine("3. Print out information for all students");
& Console.WriteLine("4. Exit program");
& key = int.Parse(Console.ReadLine());
& switch (key)
& {
case 1: Console.WriteLine("Display a student mark");
& Console.Write("Please enter name of student you would display mark for& ");
& name = Console.ReadLine();
foreach(Student std in studentlist){
& if (std.getName() == name)
& {
Console.WriteLine("Marks for " + std.getName().ToString() + " is " + std.getMark().ToString());
break;
& }
& else {
Console.WriteLine("I am sorry. Student: '" + std.getName().ToString() + "' does not exist");
break;
& }
}
break;
case 2: Console.WriteLine("Change Student Mark");
& Console.Write("Please enter name of student you would like to change mark for:");
& name = Console.ReadLine();
& foreach (Student std in studentlist)
& {
if (std.getName() == name)
{
Console.WriteLine("Current marks for& " + std.getName().ToString() + " is: " + std.getMark().ToString());
Console.Write("Enter new mark for " + std.getName().ToString()+": ");
mark = double.Parse(Console.ReadLine());
if (mark > 0 && mark < 100)
{
& std.setMark(mark);
& CalculateGrade(std);
& Console.WriteLine("New grade for " + std.getName().ToString() + " is: " + std.getGrade());
}

else {
& Console.WriteLine("Invalid Entry! Marks must be between 0 - 100!");
}
}
else
{
Console.WriteLine("I am sorry. Student: '" + std.getName().ToString() + "' does not exist");
}
& }
break;
case 3:
Console.WriteLine(" Print out information for all students");
Console.WriteLine("Name Mark Grade");
foreach (Student std in studentlist)
{

& Console.WriteLine(std.getName()+"\t\t" +std.getMark().ToString()+"\t\t"+std.getGrade());
}
break;
& }
}
while (key != 4); ;
}
catch(Exception){

}
& }
}
}


Student.cs

using System;
using System.Collections.Generic;
using System.Text;

namespace Result
{
public class Student
{
& private string name;
& private double mark;
& private string grade;
& public Student()
& {
&
& }
& public Student(string name, double mark, string grade) {
this.name = name;
this.mark = mark;
this.grade = grade;
& }
& public string getName(){
return name;
& } // to return name of student
& public double getMark(){
return mark;
& } // to return mark of student
& public string getGrade(){
return grade;
& }// to return student grade

& public void setName(string name)
& {
this.name = name;
& }&
& public void setMark(double mark){
this.mark=mark;
& } // to set student mark
& public void setGrade(string grade)
& {
this.grade = grade;
& }& // mark is first checked using a


}
}

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