编辑代码

#include <stdio.h>
int main()
{
	int gongzi;
	double shui,sum;
	scanf("%d",&gongzi);
        if(gongzi>4500){
            sum=0.20*(gongzi-1600.00);
        }else if(gongzi>3500&&gongzi<=4500){
            sum=0.15*(gongzi-1600.00);
        }else if(gongzi>2500&gongzi<=3500){
            sum=0.10*(gongzi-1600.00);
        }else if(gongzi>1600&gongzi<=2500){
            sum=0.05*(gongzi-1600.00);
        }else{
            sum==0;
        }
    printf("%.2f",sum);
    return 0;
}