Push_swap_42

Push_swap is a project which consist to produce a sorting Algorithm following some concepts to standardize the process.

Within the sorting process we should work the logic arround some operations determined by the subjec.
Bellow the list of operations:

- sa :swap 'a' - swap the first 2 elements at the top of stack 'a';
- sb :swap 'b' - swap the first 2 elements at the top of stack 'b';
- ss :sa and sb at the same time.
- pa :push 'a' - take the first element at the top of 'b' and put it at the top of 'a'.
- pb :push 'b' - take the first element at the top of 'a' and put it at the top of 'b'.
- ra :rotate 'a' - shift up all elements of stack 'a' by 1.
- rb :rotate 'b' - shift up all elements of stack 'b' by 1.
- rr :ra and rb at the same time.
- rra :reverse rotate 'a' - shift down all elements of stack 'a' by 1.
- rrb :reverse rotate 'b' - shift down all elements of stack 'b' by 1;
- rrr :rra and rrb at the same time.

Instructions

To run the application you shall input the program plus the arguments, which is the list of numbers to organize. For example:

$ ./push_swap 3 4 8 9 7 5 1 0 2 6
or
$ ./push_swap "10 30 60 42 80 99 -42"

This project was structured to run with integers, with numbers within the range of -2147483648 to 2147483647. Also, even accepting a string of numbers, if you try to input a word or a letter, as 'a' or 'hello', it will not work, returning an error message.

Bonus part

• Write a program named checker that takes as an argument the stack a formatted as a list of integers. The first argument should be at the top of the stack (be careful about the order). If no argument is given, it stops and displays nothing.
• It will then wait and read instructions on the standard input, each instruction will be followed by ’\n’. Once all the instructions have been read, the program has to execute them on the stack received as an argument.
• If after executing those instructions, the stack a is actually sorted and the stack b is empty, then the program must display "OK" followed by a ’\n’ on the standard output.
• In every other case, it must display "KO" followed by a ’\n’ on the standard output.
• In case of error, you must display "Error" followed by a ’\n’ on the standard error. Errors include for example: some arguments are not integers, some arguments are bigger than an integer, there are duplicates, an instruction doesn’t exist and/or is incorrectly formatted.