哪位高手帮我解决这道linux脚本题,我想了很长时间都没有搞定

哪位高手帮我解决这道linux脚本题,我想了很长时间都没有搞定,我列在下面
Write an ANSI C code. Use a Makefile to build it (including compile and link) into binary file.
The function of this binary file should be:
Read a serial of numbers from a given file, and then find the Top 5 maximum numbers.
You should give:
1. Makefile ( hint : one main file and one sub-routine file )
2. all C source code
3. the whole procedure of how you compile and link