c++ Primer Plus 6.5

#include <iostream>using namespace std;int main(){cout<<"Enter your income: ";double income=0,tmp=0,tax=0;while(cin>>income&&income>=0){if(income<=5000) tax=0;else if(income<=15000) tax=(income-5000)*0.1;else if(income<=35000) tax=(15000-5000)*0.1+(income-15000)*0.15;else if(income>35000) tax=(15000-5000)*0.1+(35000-15000)*0.15+(income-35000)*0.2;cout<<"Your tax is: "<<tax<<"tvarp!"<<endl;cout<<"Enter your income: ";}return 0;}