BC37 网购

三叶草

#include<stdio.h>
int main()
{
  double price = 0;//商品价格
  int month = 0;
  int day = 0;
  int flag = 0;//flag表示有无优惠券
  scanf("%lf %d %d %d",&price,&month,&day,&flag);
  if(month==11 && day == 11)
  {
    price=price*0.7;
  }
  if(month ==12 && day ==12)
  {
    price =price *0.8;
  }
  price =price -50*flag;
   if(price<0.0)
   {
     printf("%.2lf",0.00);
   }
  else
    printf("%.2lf",price);
  return 0;
}