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Yes, my problem... 1.how to write remove method of removing person from txt 2. why the "save" command doesn't save all people checked out earlier

Hi! i want to write a program that handles commands like: add: Asks for the name of person, age list: displays a list of names/surnames in a directory remove <planet name=""> removes the given person from the list detail <planet name="">: display person data (given by add) open <filename>...

Hello, I am new here. I am looking for help / hints. I have code to write that counts articles. After entering the code starting with A, do not count the tax, for B it is 8%, for the other codes 23% of the tax (I already have it), but I have a problem summing up these amounts, and the...