Question

c语言如何求一个数的阶乘

Answer 1

#include<stdio.h>
#include<math.h>
int main()
{
int t,n;
scanf("%d",&t);
while(t--)
{
scanf("%d",&n);
printf("%d\n",(int)( 0.5*log10(2*3.1415926*n) + n*log10(n/2.7182818284) )+1);
}
return 0;
}斯特林公式

Answer 2

#include<stdio.h>

int main()
{
int a,n,b=1;
scanf("%d",&n);
for(a=1;a<=n;a++)
{
b=b*a;
}
printf("%d",b);
return 0;
}

Answer 3

递归求阶乘