c++namespacesmanipulators

How to unsetf ios::fixed without using namespace std

Soooo... I want to write this code without using namespace std; because I recently learned "polluting the global namespace" is bad practice.

#include <iostream>
#include <fstream>
#include <string>
#include <iomanip>

using namespace std; // bad practice, trying to remove

int main() {
    std::ofstream outFile; // instead use explicit namespaces

    /* lots of code */

    // eventually I set some manipulators
    outFile << std::fixed << std::showpoint << std::setprecision(2);

    /* more code */

    // later I wish to unset fixed
    outFile.unsetf(ios::fixed); // <-- this part

I was doing fine without the namespace until this outFile.unsetf(ios::fixed) which works only if I use the namespace std. I have attempted to write the following variations without using the namespace:

outFile.unsetf(ios::fixed)
outFile.unsetf(std::fixed)
outFile.unsetf(ios::std::fixed)

Is ios a namespace inside of the std namespace? Then, this next one makes the most sense to me but also does not work.

outFile.unsetf(std::ios::fixed)

Primarily, I would like some help fixing this line using explicit namespaces. Secondarily, if there's a critical knowledge gap I need to close, some help identifying it and maybe some keywords to go look up would be helpful.

Solution

  • Use std::ios_base::fixed:

    outFile.unsetf(std::ios_base::fixed);