How can I format floating-point numbers in C using `std::ostream`?

Floating Point Formatting for std::ostream

While attempting to format a double using std::cout, a developer encounters difficulties in achieving the desired output, contemplating resorting to printf_s. They seek a comprehensive source that consolidates formatting options in one place.

The solution involves employing stream manipulators provided by the header. By utilizing the std::fixed, std::setw, std::setprecision, and std::setfill manipulators, it is possible to achieve the desired output. Here's an example:

<code class="cpp">std::cout << std::fixed << std::setw(11) << std::setprecision(6) << my_double;</code>

This example will print " 42.000000". By adjusting the values passed to std::setw and std::setprecision, you can modify the width and precision of the formatted number. Additionally, std::setfill allows you to specify a fill character for the unoccupied spaces.

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