c语言--计算组合数

#include

unsigned long Fact(unsigned int   n);

int main()

{
int m,k;

unsigned long p;

do{

printf("Input m,k(m>=k>0):");

scanf("%d,%d",&m,&k);

}while(m

p=Fact(m)/(Fact(k)*Fact(m-k));

printf("p=%lu\n",p);

return 0;

}

unsigned long Fact(unsigned int   n)

{
unsigned int  i;

unsigned long result = 1;

for(i =2;i<=n;i++)

result*=i;

return result;

}