What is long?
C++ does take time to build. If your project and the engine are on a standard hard drive then it will be slower still.
Also, clock speed and number of cores in your CPU make a difference as well.
even 1 hour is it use to compile ?
is there any error or crash stuff with my code?
The code would generate an error within a minute most likely. The engine itself when compiled from code can take up to 3 hours but you don’t build the engine every time.
What you need to do is try building from within Unreal itself using the compile button. Then the output window will show any errors if there are any
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