#include <iostream.h>
#include <stdlib.h>
int main[]
{
 int i,n
 int fac=0;
 do{
 print("­pºân!, ½Ð¿é¤Jn(n>=0)¡G") 
 scantf("%f,n");
 if (n=0)
   (
     print("0!=1 /n");
     system("PAUSE");
     return 0;
   )
     
 }while(n>=0);
 
 for (i=1, i<n, i+1);
    fac = fac * n ;
 Printf("%f!=%f",n,fac);
 system("PUASE");
 return 0;
)