How do I calculate pi using monte carlo method

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The output should be tabulated to list n, c and the Pi value for each estimate of Pi up to a chosen number of points input by the user at run time. If the user input 500 for example, there should be 500 rows displayed.

What I have tried:

C++

Console.Write("Please enter a Random Number:  ");
string input = Console.ReadLine();
n = double.Parse(input);

if ((n < 1) || (n > 500))
    Console.WriteLine("Error!The number should be between 1 and 500!"
        + "Please try again");

else
    while (n < 500)
    {
        Console.Write("N" + n);
        n++;
    }
{
    int x = 1;
    double y = 1;
    c = x * x + y * y;
    c++;
}
{
    Pi = 4 * c / n;
    Pi++;
    Console.WriteLine("N : {0}", n);
    Console.WriteLine("C: {0}", c);
    Console.WriteLine("Pi: {0} ", Pi);
}

Posted 18-Mar-16 17:40pm

Member 12402651

Updated 19-Mar-16 0:10am

Richard MacCutchan

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Comments

Sergey Alexandrovich Kryukov 19-Mar-16 1:07am

How is it related to Monte Carlo? What makes you thinking that Pi digits can be found using the Monte Carlo method?
—SA

Richard MacCutchan 19-Mar-16 5:51am

Quite a lot of that code does not seem to make sense. What exactly is the problem?

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This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

OriginalGriff · Answer 1 · 2016-03-19T00:10:00

Um.
What do you expect that code to do?
You read a "random number" from the user - which is a strange idea to start with - and if it's outside the limits (that you didn't tell him) you print a message, but continue to use it anyway...
Otherwise, you write all the numbers from that value up to 500 inclusive and continue anyway.
Regardless of what you printed earlier, you set c to three by a convoluted method, and then assume that pi is 0.024, add one to it, and print

C#

N : 500
C : 3
Pi: 1.024

I know this is probably your homework, but you need to throw that away, sit down, and try to work out exactly what you are supposed to be doing here - because that isn't even close to what you teacher asked for! :laugh:

How do I calculate pi using monte carlo method

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How do I calculate pi using monte carlo method

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