C++primer plus第六版课后编程练习答案6.5

#include<iostream>
#include<cctype>
#include<cstdlib>//support for exit()，atoi()
#include<string>
#include<fstream>//文件I/O
#include<sstream>//stringstream转换各种数据格式

using namespace std;

void a5()
{

int n=0,s=0;
while(n>=0)
{
cout<<"请输入你的收入(tvarp):";
cin>>n;
if(!cin)
{
cin.clear();
break;
}
if(n>=0 && n<=5000)
cout<<"你的所得税为 "<<s<<" tvarp\n";
else if(n>5000 && n<=15000)
{
s=(n-5000)*0.1;
cout<<"你的所得税为 "<<s<<" tvarp\n";
}
else if(n>15000 && n<=35000)
{
s=10000*0.1+(n-15000)*0.15;
cout<<"你的所得税为 "<<s<<" tvarp\n";
}
else
{
s=10000*0.1+20000*0.15+(n-35000)*0.2;
cout<<"你的所得税为 "<<s<<" tvarp\n";
}
}
}