编辑代码

#include<stdio.h>

int main(){
    float discount;
    scanf("%f",&discount);
    if(discount<=1000){
       printf("%f\n",discount);
       return 0;
    }
    if(1000<discount && discount<2000){
        printf("%f\n",0.95*discount);
         return 0;
    }
    if(2000<=discount && discount<3000){
        printf("%f\n",0.9*discount);
         return 0;
    }
     if(discount > 5000 && discount < 8000){
        printf("%f\n",discount * 0.8);
         return 0;
    }
}