Convert int to two's complement binary

Question

Write in C++ language a command line program with this sintax:
save_int <filein.txt> <fileout.bin>
First parameter is the name of a file in text format that holds integer numbers with sign in base 10 from -1000 to 1000 separeted by whitespaces. The program must create a new file, with the name passed as second parameter, with the same numbers saved in binary at 11 bit in two's complement.

Answer 1

This would be cool if we could actually do it in the Code Playground...