求n！的源程序？

求n！的源程序？

#include <iostream.h>
#include <conio.h>

int fact(int n);

main()
{
int m;
cout<<"Please input a number:";
cin>>m;
cout<<fact(m);
getch();
return 0;
}

int fact(int n)
{
if (n <=1)
return 1;
else
{
return n*fact(n-1);
}
}

public class Test {

public static void main(String[] args) { // TODO Auto-generated method stub int num = 1; for (int i = 1; i <= 10; i++) { num *= i;

} System.out.println(num);

}

}

#include<stdio.h>

int main()

{

int i,n;

double result=1;

printf("input n:");

scanf("%d",&n);

for(i=1;i<=n;i++) result*=i;

printf("result = %f",result);

return 0;

}