C语言用WHILE循环求n阶乘

#include<>

int main()

{int n,i=1;

 float f=1.0;

 printf("please as input an integer>=0.\n");

 scanf("%d",&n);

 while(i<=n)f*=i++;

 printf("factorial of %d is:%.2f\n",n,f);

 system("pause");

 return 0;

}