普通的if语句 （代码有亿点长，细品）

#include<bits/stdc++.h>
using namespace std;

int main(){
	int n;
	cin>>n;
	if(n<=100000){
		cout<<fixed<<setprecision(2)<<n*0.1;
	}
	if(100000<n&&n<=200000){
		cout<<fixed<<setprecision(2)<<10000+(n-100000)*0.075;
	}
	if(200000<n&&n<=400000){
		cout<<fixed<<setprecision(2)<<17500+(n-200000)*0.05;
	}
	if(400000<n&&n<=600000){
		cout<<fixed<<setprecision(2)<<27500+(n-400000)*0.03;
	}
	if(600000<n&&n<=1000000){
		cout<<fixed<<setprecision(2)<<33500+(n-600000)*0.015;
	}
	if(1000000<n){
		cout<<fixed<<setprecision(2)<<39500+(n-1000000)*0.01;
	}
	return 0;
}