I am running a program using this simple example code to output a text file. I am using Xcode and simply started a new C++ project from command line tools. For some reason t
Dang I can't believe I figured it out, it was an option in Xcode. So I clicked on the bar at the top of xcode near the stop button with the text (Project Name > My Mac 64-bit)
Then clicked edit scheme. The clicked on the options tab and clicked use custom working directory. Then selected a working directory. Now the text file appears!
To find the current working directory, in the project navigator, under the "Products" folder, right-click the product and choose "Show in Finder". In this directory you will also find the compiled code.
For example: ~/Library/Developer/Xcode/DerivedData/<project name>-gweghgfqkjkidjfhcgetdryechjz/Build/Products/Debug
As mentioned above, editing the scheme worked for me but getting to the scheme was different.
I also had the Run/Debug option selected in the left hand pane of the window.