#include <stdio.h>
#include <stdlib.h>
int main() {
printf("|===用户缴费单===|\n");
printf("| |\n");
printf("|+++++姓名+++++|\n");
printf("\n请输入年用电量:");
double sum=0;
scanf("%lf",&sum);
if(0<=sum && sum<=200){
printf("电价:%.3lf",sum*0);
}else if(201<=sum && sum<=2160){
printf("电价:%.3lf",sum*0.498);
}else if(2161<=sum && sum<=4200){
printf("电价:%.3lf",sum*0.548);
}else if(sum>=4201){
printf("电价:%.3lf",sum*0.798);
}
return 0;
}