[Linux c++] Hi , I ask the same question three times, but their answer is not correctly,

I need forkandsquare.cc to solve this question, and it must be need fork method and linux's pip,

beg your correctly answer, thank you very much.

lastchar.cc: This program takes the string in the first argument and returns the last character of that string. For example, if the user runs lastchar ANTIDISESTABLISHMENTARIANISM the program should return 'M'. lastchar shouldn't print anything. It should just return a single character. firstchar.ce: This program should ask the user for a word. This program should then reverse the word and pass it to lastchar (using fork). lastchar will then return its last character, which should be your first character. Your program should print out the returned character. forkandsquare.cc This program is independent of lastchar and firstchar. This program should fork a copy of itself. The PARENT should ask the user for an integer. The PARENT should send that integer through a pipe to the CHILD. The CHILD should square the integer and pass the square through a pipe to the PARENT. The PARENT should print out the integer