Hello everyone,
this question is probably simple for you ppl but i am jus a beginner and still learing. i was wondering if someone could tell me that how does unix identify different program codes in it's environment.
for example, unix recognises this C code in the body of any script. how does that work? or for instance if it was something written in perl, it would be supported!?

#include <stdio.h>
FILE *popen(const char *command, const char *open_mode);
int pclose(FILE *stream_to_close);

Can someone please help me on that!?
Thank You!