De ce zero factorial este 1

 mihai96alex, on 31 decembrie 2017 - 10:01, said:

 Mosotti, on 31 decembrie 2017 - 10:20, said:

 Mosotti, on 31 decembrie 2017 - 10:20, said:

public class Factorial{
	 public static void main(String []args){
	 int factorial = 1;
	 int n = 10;
	
for (int i = 0 ; i<=n; ++i) {
for (int j = 0 ; j<=i; ++j) {
factorial *= j+1;
}
factorial /= i+1;
System.out.println( i + "!=" + factorial);
factorial = 1;
	 }
}
}

$javac Factorial.java
$java -Xmx128M -Xms16M Factorial
0!=1
1!=1
2!=2
3!=6
4!=24
5!=120
6!=720
7!=5040
8!=40320
9!=362880
10!=3628800

public class FactorialClasic{
	 public static void main(String []args){
	 int factorial = 1;
	 int n = 10;
	
	 for (int i = 0 ; i<=n; ++i) {
		 if ( i == 0 ) {
			 ;
		 }
		 else {
			 for (int j = 1 ; j<=i; ++j) {
				 factorial *= j;
			 }
		 }
		 System.out.println( i + "!=" + factorial);
		 factorial = 1;
	 }
}
}

$javac FactorialClasic.java
$java -Xmx128M -Xms16M FactorialClasic
0!=1
1!=1
2!=2
3!=6
4!=24
5!=120
6!=720
7!=5040
8!=40320
9!=362880
10!=3628800

Edited by navistar_eagle, 31 December 2017 - 11:36.

 navistar_eagle, on 31 decembrie 2017 - 11:11, said:

Edited by dani.user, 31 December 2017 - 12:37.

 karax, on 31 decembrie 2017 - 09:25, said:

 dani.user, on 31 decembrie 2017 - 12:35, said:

 karax, on 31 decembrie 2017 - 12:59, said:

 karax, on 31 decembrie 2017 - 12:59, said:

Edited by MarianG, 31 December 2017 - 14:02.

• Timp si/sau spatiu cat mai scazut pentru a rezolva problema in cauza
  
• Cod mai usor de inteles

• Codul e atat mai lung, cat si mai greu de urmarit (stai sa te gandesti de ce ai face o impartire cand vine vorba de factorial)
  
• Codul e mai lent, compilatorul ajungand sa insereze idiv, fiind cunoscut ca impartirea e una din cele mai lente instructiuni

Edited by dani.user, 31 December 2017 - 14:18.

 MarianG, on 31 decembrie 2017 - 13:54, said:

 navistar_eagle, on 31 decembrie 2017 - 11:42, said:

int factorial(unsigned int n)
{
	unsigned int result = 1; // assume n = 0
	while (n) {
		result *= n--;
	}
	return result;
}

Edited by MarianG, 31 December 2017 - 14:11.