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Views: 2882 | Replies: 9
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Join Date: Nov 2006
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Newbie Poster
having problem while creating factorial i want to write a program that will output all of the factorials up to a maximum number provided....if anyone can guide me, thanks...
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Join Date: Oct 2006
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Junior Poster in Training
youll need an outer loop which loops as high as the amount of factorials you want to compute, and an inner loop which will compute the factorial at the outer loops number.
pseudocode:
input n
set x = 1
loop n times
set num = 1
set y = 0
loop from x to 1
multiply num by y and re-store it into num
end loop
print num
end loop
that should do the job....unless i overlooked something
pseudocode:
input n
set x = 1
loop n times
set num = 1
set y = 0
loop from x to 1
multiply num by y and re-store it into num
end loop
print num
end loop
that should do the job....unless i overlooked something
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Join Date: Oct 2006
Location: Idaho
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Light Poster
Well, first of all you need to know what a factorial is. You haven't demonstrated that you know anything on how to solve this problem yet. If you need a description on what a factorial is here's a link.
http://mathworld.wolfram.com/Factorial.html
You would have to have a loop inside of a loop in order to make this work. Here's a little bit of code to get you started on your merry way:
the factorial is saved to the int result. If you want multiple answers just put the whole thing in a for loop incrementing factorial till you get to the desired value.
Hope this is helpful. I don't want to solve the whole thing for you though...
http://mathworld.wolfram.com/Factorial.html
You would have to have a loop inside of a loop in order to make this work. Here's a little bit of code to get you started on your merry way:
int factorial = 4;
int result = 1;
for (int i = 0; i < factorial; i++)
result *= i+1;
System.Console.WriteLine("result:" + result);the factorial is saved to the int result. If you want multiple answers just put the whole thing in a for loop incrementing factorial till you get to the desired value.
Hope this is helpful. I don't want to solve the whole thing for you though...
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Join Date: Nov 2006
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Newbie Poster
Re: having problem while creating factorial thanks a lot for the help both of ya guys..the way i did using the code above as following and worked perfectly fine for the results required...
static void Main(string[] args)
{
int num;
int j;
Console.WriteLine("Enter the number: ");
num = int.Parse(Console.ReadLine());
for (int i = 1; i <=num; i++)
{
Console.Write("1");
int total = 1;
for (j=1; j <= i; j++)
{
Console.Write("X" + j);
total = total*j;
}
Console.WriteLine(" = " + total);
}
}
static void Main(string[] args)
{
int num;
int j;
Console.WriteLine("Enter the number: ");
num = int.Parse(Console.ReadLine());
for (int i = 1; i <=num; i++)
{
Console.Write("1");
int total = 1;
for (j=1; j <= i; j++)
{
Console.Write("X" + j);
total = total*j;
}
Console.WriteLine(" = " + total);
}
}
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Join Date: Oct 2006
Location: Idaho
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Light Poster
That looks great. I'm glad I could help you. I just took a math assessment and I needed a little encouragment. lol. Don't hesitate to ask if you need help on anything else.
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Join Date: Oct 2006
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Nice program! I ran it and for factorial 13 I got 1932053504 when it should be 6227020800.
No one died when Clinton lied.
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Join Date: Nov 2006
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Newbie Poster
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Originally Posted by sneekula 
Nice program! I ran it and for factorial 13 I got 1932053504 when it should be 6227020800.
That because he used int type to total variable which can hold 2,147,483,647 as maximum positeve value.
You can change this line:
int total = 1;
to:
double total = 1;
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Join Date: Oct 2006
Location: Idaho
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Light Poster
Thanks for that response. That's what I was going to say. This problem does require a little extra thinking for really large numbers. You need to have an understanding about basic programming.
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Join Date: Aug 2005
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For really large number you need to consider using strings.
Perhaps even karbutstra's algo, for efficient multiplication.
Perhaps even karbutstra's algo, for efficient multiplication.
I'm not a programmer. My attitude starts with ignorance, holds steady at conversation, and ends with a trip to the hospital. Get used to it.
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Join Date: Aug 2005
Posts: 4,782
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And if you can manage it I think there is a possibility to integrate java's big number class with vb.net or so I've read.
I'm not a programmer. My attitude starts with ignorance, holds steady at conversation, and ends with a trip to the hospital. Get used to it.
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