一C语言if语句程序,求用switch改写!

#include
main()
{
int n;
float price,money,r;
int discount;//折扣
printf("请输入商品购买量和单价:\n");
scanf("%d,%f",&n,&price);
discount = n/10;
switch (discount)
{
case 0: r = 1.0;break;
case 1:
case 2:
case 3:
case 4:r=0.9;break;
case 5:
case 6:
case 7:
case 8:
case 9:r=0.8;break;
default:r = 0.7;break;
}
money=price*r*n;
printf("应付%f元钱\n",money);
}
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