Question

求1到10的阶乘

提示：
当 n=1 时 n! = 1
当 n>1 时 n! = (n-1)! * n

Answer 1

#include <stdio.h>
long fun(int n)
{
long s=1;

if(n == 1)
s=1;
if(n != 1)
s=n*fun(n-1);

return s;

}
void main()
{
long sum = 0;
int n=1;
for(n;n<=10;n++)
{
sum = fun(n);
printf("%ld\n",sum);
}

}

Answer 2

int factorial(int n) {
return (n == 1) ? 1 : factorial(n-1) * n;
}

Answer 3

10！＝10×9×8×7×6×5×4×3×2×1＝362800

Answer 4

int s = 0 ;
if(n==1)
s = 1 ;
ele
s= f(n-1)*n ;

return s ;

Answer 5

1*2*3*4*5*6*7*8*9=3628800