While Loop Code HELP ME!!

[jayceegungon15]

Hi Everyone! Can you help me do this program because i am a beginner. =)
Here is the sample output:

Enter Number: 5
Solution:
5 x 4 x 3 x 2 x 1
Result is 120




Using WHILE LOOP CODE!!

TY IN ADVANCE TO THOSE WHO WILL HELP ME! :)

[manudude03]

#include <iostream>

int main()
{
    int number;
    std::cout << "Enter Number" << std::endl;
    std::cin >> number;
    int product=1; // set to 1 since we're multiplying
    while (number > 0)
    {
        product*=number // this multiplies the current product by number;
        number--; // this subtracts number by 1;
    }
    std::cout << product << std::endl;
}

[jrfrago]

you may call this overloaded function:

long int factorial(int x) {
   if (x==0) return 0;
   else if (x==1) return 1;
   else return x * factorial(x-1);}
 

[mutexe]

that's a recursive function. not an overloaded one.

[jrfrago]

I stand corrected but what is more important is what it does and not what it is classified.

[andywestken]

0! is 1

Also, what does your function do in this case?

int res = factorial(-3);

Andy

PS http://en.wikipedia.org/wiki/Factorial

The value of 0! is 1, according to the convention for an empty product.

[vlad from moscow]

#include <iostream>
#include <vector>
#include <numeric>
#include <iterator>
#include <functional>

int main()
{
	while ( true )
	{
		std::cout << "Enter a non-negative number (0 - exit): ";

		unsigned int n = 0;
		std::cin >> n;

		if ( !n ) break;

		std::vector<unsigned int> v( n );
		std::iota( v.begin(), v.end(), 1 );

		std::cout << "\nTable of factorials for n = " << n << std::endl;

		std::partial_sum( v.begin(), v.end(), 
		                  std::ostream_iterator<unsigned int>( std::cout, "\n" ),
			  	  std::multiplies<unsigned int>() );

		std::cout << std::endl;
	}
}

[ciphermagi]

lol vlad. You're funny, and I approve.