#include<stdio.h> void main() {double ap,rp,discount,save; printf("请输入应付金额:"); scanf("%lf",&ap); switch(int(ap/1000)) {case 1:discount=0.95;break; case 2:discount=0.9;break; case 3:discount=0.85;break; case 4:discount=0.80;break; default:discount=1; } save=ap*(1-discount); rp=ap-save; printf("优惠金额为%.2lf,实付款为%.2lf.\n",save,rp); }
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