[c++] help, cant get this to work

hi im trying to learn Cpp and i was doing stuff from the book
and i got stuck at this

Code:

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#include <iostream>
int main() {
    // Declare the variables
    unsigned short quantity;
    float price; // float tell it what to rember
    float taxRate;
   
    // Assign values
    quantity = 3;
    price = 19.95; //linked to "float pirce"
    taxRate = 0.05; // linked to "float taxRate"
   
    //tell them the name of the app and what it does
    std::cout << "widget cost calculator\n";
   
    // output
    std::cout << "the cost of purchasing "
    << quantity <<" widget(s) at price of $" << price
    << ", with tax, comes to $";
   
        // Adjust the formatting
    std::cout.setf(std::ios_base::fixed);
    std::cout.setf(std::iso_base::showpoint);
    std::cout.precision(2);
   
    //calculation
    std::cout << ( (quantity * price) + ((quantity * price) * taxRate))<< ".\n";
   
    std::cout << "PRESS ENTER!/n";
   
    std::cin.get();
    return 0;
}

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for some reson it says

Code:

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    std::cout.setf(std::iso_base::showpoint);

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Quote:

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25 C:\Dev-Cpp\chapter 2.cpp `std::iso_base' has not been declared

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is my problem...but i have know idear why...(dumb book doesnt say what it does...)

book writer/s: Larry Ullman, Andreas Signer

/bump ...doesnt any one know Cpp?

You put iso_base instead of ios_base. It's a typo. Learn to read error messages and check your code better.

hi im dislexic....

need headers and namespace

#include <iostream>

using namespace std;