C++ cin read float value

#include <iostream>
using namespace std;
#include <iomanip.h>
int main()//from  ww  w.j  a v a2 s  . c  om
{
   float total_sale;     // User's sale amount goes here.
   float stax;
   // Display a message for the user.
   cout << "What is the total amount of the sale? ";
   // Receive the sales amount from user.
   cin >> total_sale;
   // Calculate sales tax.
   stax = total_sale * .07;
   cout << "The sales tax for " << setprecision(2) << total_sale << " is " << setprecision (2) << stax;
   return 0;
}