unable to get percentage in decimal values ?

SUNIL GUTTA

Hie friends

I Have written this code in note pad i am trying to pass values via command prompt i.e

after compiling : csc cmdparams.cs then after

i am passing cmdparams 70 75 64 58 79 83 73 50

using System;

class cmdparams

{

static void Main(string[] args)

{

int sum = 0;

double per = 0;

foreach (string str in args)

sum += int.Parse(str);

per = Convert.ToInt32(sum * 100 / 750);

Console.WriteLine("sum is {0}", sum);

Console.WriteLine("percentage is {0}", per);

Console.ReadLine();

}

problem here is when i calculate percentage i am getting round figure like 73 but in reality its 73.6 ..

-->> Here i want to display output in cmd-prompt with decimals ??

Is there any way ?

Thank you

3 Replies

Know the answer? Post it — somebody with the same question will find it here.

Vulpes13y ago
Accepted answer
Just replace this line:

per = Convert.ToInt32(sum * 100 / 750);

with this:

per = sum * 100.0 / 750.0;

Using double rather than integer constants (i.e. 100.0 rather than 100 etc) will force floating point arithmetic to be performed.
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Vulpes13y ago
Posting your problems here will usually be the quickest way to get an answer as the time I have for answering them is very limited nowadays.

Also, this isn't a silly problem - it's something that can catch anyone out - but is easy to avoid as long as you think about each step in the calculation and whether you need to perform integer or floating point arithmetic.
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SUNIL GUTTA13y ago
Thank you vulpes you just spot on :)

Hey can you provide ur gamil or any mail id so i can contact u for my silly silly problems rather i post here and mess up :)
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