支持 Double ~~~~~

810974380 2249 Accepted 168K 0MS C 


#include<stdio.h>
#include<stdlib.h>
double fab(long m,long n)
{ double ans=1,w=1;long i;
  if(n>m/2) n=m-n;
	for(i=n;i>=1;i--)
	{
		w*=(m-n+i);
		if((int)w%i==0) w/=i;
		else ans*=i;
	}
	return w/ans;
}
int main()
{long a,b;
 while(scanf("%ld%ld",&a,&b))
 {if(a==0&&b==0) break;
  printf("%0.f\n",fab(a,b));
 }
 system("pause");
 return 0;
}