You are having a problem of copy paste in Turbo C++. But shortcuts make it very easy to code the program.
In Turbo c ++, the ctrl + c key cannot be used for copying, and ctrl + v cannot be used for pasting. Meaning that window functions in turbo c ++ cannot be used to copy-paste.
With ctrl + ins you can copy the code of the program and paste it with shift + ins. Otherwise, you can also copy or paste the code with menu options.