float money,cost,price;
printf("输入花费多少钱:\n");
scanf("%lf",&money);
if(money>=500)
{
cost=0.8;
price=money*cost;
printf("%.2lf",price);
}
else if(money<=500 && money>=300)
{
cost=0.85;
price=money*cost;
printf("%.2lf",price);
}
else if(money<=300 && money>=100)
{
cost=0.9;
price=money*cost;
printf("%.2lf",price);
}
else if(money<=100 && money>=50)
{
cost=0.95;
price=money*cost;
printf("%.2lf",price);
}
else
printf("实际花费%.2lf",money);
}