Question

Using Visual Studio write a program that allows the user to enter multiple scores ranging from 0 to 100, computes the average of

those scores and then writes out a letter grade using the typical grading scale. Your program will also:

1. Allow the user to enter any number of scores he or she wishes but assume there will be at least one

score entered.

2. Use a sentinel-controlled loop variable to terminate the loop when the user has no more scores to

enter. Hold user in a loop if a “yes” or “no” is not entered.

3. Use the TryParse method, to hold the user in a loop if a non-numeric value is entered. To exit the loop,

the user must enter correct input.

4. Hold the user in a loop if a value less than 0 or greater than 100 is entered.

Answer 1

using System;

class Program

{

static void Main() {

int n=0,check=1;;

double total=0,score=0,avg;

char grade='a';

string val;

Console.Write("Enter score (no to stop): ");

val = Console.ReadLine();

while (!val.Equals("no"))

{

check=1;

while (check==1)

{

check = 0;

if (!double.TryParse(val,out score))

{

Console.Write("Enter a numeric value!!!: ");

check=1;

val = Console.ReadLine();

}

else if (score<0 || score>100)

{

Console.Write("Score should be greater than 0 and less than 100: ");

val = Console.ReadLine();

check=1;

}

else

{

n=n+1;

total=score+total;

}

}

Console.Write("Enter score (no to stop): ");

val = Console.ReadLine();

}

avg=total/n;

if(avg>=80)

grade='A';

else if(avg>=60)

grade='B';

else if(avg>=50)

grade='C';

else if(avg>=40)

grade='D';

else

grade='F';

Console.WriteLine("Calculated grade: "+grade);

}

}