Question

This is from Microsoft Visual C#: An Introduction to Object Oriented Programming by Joyce Farrell (7th Edition)

The provided file has syntax and/or logical errors. Determine the problem(s) and fix the program.

/*

The program requires the user to guess the number of days it takes to make X amount of money when doubling the value every day.

The starting value is $0.01.

The program indicates if the guess is too high, or too low.

*/

using System;

using static System.Console;

using System.Globalization;

class DebugFive4

{

   static void Main()

   {

      const double LIMIT = 1000000.00;

      const double START = 0.01;

      string inputString;

      double total;

      int howMany;

      int count;

      Write("How many days do you think ");

      WriteLine("it will take you to reach");

      Write("{0 starting with {{1}",

         LIMIT.ToString(C), START.ToString("C", CultureInfo.GetCultureInfo("en-US"));

      WriteLine("and doubling it every day?");

      inputString = ReadLine();

      howMany = Convert.ToInt32(inputString);

      count = 0;

      total = START;

      while(total == LIMIT)

      {

         total = total * 2;

         count = count + 1;

      }

      if(howMany >= count)

         WriteLine("Your guess was too high.");

      else

        if(howMany =< count)

           WriteLine("Your guess was too low.");

        else

           WriteLine("Your guess was correct.");

      WriteLine("It takes 0 days to reach {1}",

         count, LIMIT.ToString("C", CultureInfo.GetCultureInfo("en-US")));

      WriteLine("when you double {0} every day",

         START.ToString("C", CultureInfo.GetCultureInfo("en-US")));

   }

}

Answer 1

Hi,

Please find below code .

using System;

using static System.Console;

using System.Globalization;

class DebugFive4
{
static void Main()
{

const double LIMIT = 1000000.00;
const double START = 0.01;
string inputString;
double total;
int howMany;
int count;

Write("How many days do you think ");
WriteLine("it will take you to reach");
WriteLine(LIMIT.ToString("C"));
WriteLine(START.ToString("C"));
// Please make sure flower brackets are in place.
Write("{0} starting with {1}",LIMIT.ToString("C"),START.ToString("C"),CultureInfo.GetCultureInfo("en-US"));
WriteLine("and doubling it every day?");
// The below line should be Console.ReadLine() to read input from user from console.
inputString = Console.ReadLine();
howMany = Convert.ToInt32(inputString);
WriteLine(howMany);
  
count = 0;
total = START;
WriteLine(total);
  
// Since total is double values will never reach exactly 1000000. so its approxiamtely count days.
// so conditional operator should be <=.
while(total <= LIMIT)
{
Write("Total after each loop: "+total+"\n");
total = total * 2;
count = count + 1;
}
  
if(howMany > count)
WriteLine("Your guess was too high.");
else
{
// Note the conditional operator correctd it should be <= and not =<.
if(howMany < count)
WriteLine("Your guess was too low.");
else if(howMany == count)
WriteLine("Your guess was correct.");
}
Write(count);
WriteLine("It takes {0} days to reach {1}",count, LIMIT.ToString("C", CultureInfo.GetCultureInfo("en-US")));
WriteLine("when you double {0} every day",START.ToString("C", CultureInfo.GetCultureInfo("en-US")));

}

}

output :

Thanks,

kindly upvote.