C++ – Redirect std::cout to newly created console

cconsolecoutwindows

When you create a C++ console application under Windows you automatically get the console window created for you and std::cout outputs to the console window.

I have a GUI application for which I also want to create a console window. I can create the console window using the AllocConsole() function, but how do I redirect / attach std::cout to the console so that the output appears in the console window?

Best Answer

You want to use the GetStdHandle and SetStdHandle. Given that it is a long, long time since I have done anything similar, you would be better looking at some Some examples

There is also this duplicate question

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C# – How to get the application’s path in a .NET console application

System.Reflection.Assembly.GetExecutingAssembly().Location¹

Combine that with System.IO.Path.GetDirectoryName if all you want is the directory.

¹As per Mr.Mindor's comment:
System.Reflection.Assembly.GetExecutingAssembly().Location returns where the executing assembly is currently located, which may or may not be where the assembly is located when not executing. In the case of shadow copying assemblies, you will get a path in a temp directory. System.Reflection.Assembly.GetExecutingAssembly().CodeBase will return the 'permanent' path of the assembly.

C++ – Why is “using namespace std;” considered bad practice

This is not related to performance at all. But consider this: you are using two libraries called Foo and Bar:

using namespace foo;
using namespace bar;

Everything works fine, and you can call Blah() from Foo and Quux() from Bar without problems. But one day you upgrade to a new version of Foo 2.0, which now offers a function called Quux(). Now you've got a conflict: Both Foo 2.0 and Bar import Quux() into your global namespace. This is going to take some effort to fix, especially if the function parameters happen to match.

If you had used foo::Blah() and bar::Quux(), then the introduction of foo::Quux() would have been a non-event.

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C# – How to get the application’s path in a .NET console application

C++ – Why is “using namespace std;” considered bad practice

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