What you get it C programming language SOURCE-code that needs to be compiled to a binary file with machine instructions (and loader/linker instructions).
To compile this C-program, you need a compiler. There is one in Sun free software CD. If you install that compiler, it will end up in directory
/usr/sfw/bin
To run the c compiler, that is named
gcc, to compile your source code you need to write this in the same directory where you store the source code from a terminal.
Quote:
/usr/sfw/bin/gcc micro.c -o micro
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Then it will create a runnable binare called micro in same directory. That file you can load and run with this command from same place.
But this will not change any other programs way of showing the time on screen or in a log file.
Get a basic C programmers book and a basic Unix user book. You will need it to understand how Unix works.