Help with factorial!

[lirik]

Hey guys, so I'm trying to make it so that my factorial variable chooses the number of the cust variable and uses the factorial equation on it.

When I print the factorial, to see if it is working correctly -- it doesn't seem to be. I get:

1
2
2
6
12
12
48
144
288
288
1440
5760
17280
34560
34560
207360

And it goes on and on and on.

//Problem #2
double sigma=3, cust,rate, factorial=1, x;

for(cust=1;cust<=10;cust++)
{
                          
                          for(x = cust; x >= 1; x--)
                                             {
                                             factorial=factorial*x;
                                             cout<<factorial<<endl;
                                             }
                          //rate=(pow(sigma,cust)*exp(-sigma))/factorial;
                          //cout<<rate<<endl;
                          
}


system("PAUSE");
return 0;
}

The ultimate goal is to have it so that the rate equation gets used 10 times but having to calculate a different factorial from CUST 1-10.

I probably didn't explain it to well but I hope you know what I'm talking about, worst case I could type out the problem I am working on.


Thanks!

[codekiddy]

//Problem #2
double sigma=3, cust,rate, factorial=1, x;

cout<<factorial<<endl;
++factorial        //seting to 2
cout<<factorial<<endl;

for(cust=1;cust<=10;cust++)
     for(x = cust; x >= 1; x--) {
           factorial *= factorial;  //multiples with rezult each time
           cout<<factorial<<endl;
      }
return 0;
}

[lirik]

Thanks for the reply!

I just copied this code and the output doesn't match up with what i'm asking o_O. This multiplies numbers like 4*4=16 16*16 = 256 256*256 = ect..

I'm talking about factorials, so its 4! 4*3*2*1 or 6! 6*5*4*3*2*1.

[codekiddy]

lol sory I feal so stupid now :D

int main() {
double factorial = 6; // 6!
    for(int x = factorial - 1; x >= 1; --x) {
        factorial *= x;
        cout << factorial << endl;
    }
       return 0;
}

[whitenite1]

@lirik

Here is your code made to show the factorials.

// Factorial.cpp : Defines the entry point for the console application.
// Problem #2

#include <cstdlib>
#include <iostream>
#include <string>

using namespace std;

int main()
{
	double sigma=3, cust,rate, factorial=1, x;

	for(cust=1;cust<=10;cust++)
	{
		factorial = 1;
		for(x = cust; x >= 1; x--)
			factorial=factorial*x;
		cout << "cust = " << cust << " : " << factorial << endl;
		
		//rate=(pow(sigma,cust)*exp(-sigma))/factorial;
		//cout<<rate<<endl;

	}


	system("PAUSE");
	return 0;
}

Since you never reset the factorial to 1 for each of the 10, the numbers kept climbing. I added some text to show the value of each.

[lirik]

Thank You whitenite... it was a rough draft I was going to make it more organized and readable later.

But ya, not resetting the factorial back to 1 was my issue, doh :(

[codekiddy]

Hmm ^^...

I wish I could delete my posts, being idiot two times in a row.

[lirik]

Haha don't worry about it, all good :P