void main()

 {

     setvbuf(stdout,NULL,_IONBF,);

     int fac(int n);

     int i;

     for(i=;i<=;i++)

         printf("%d!=%d\n",i,fac(i));

 }

 int fac(int n)

 {

     static int f=;

     f = f*n;

     return f;

 }