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what specific aspect are you stuck on? and please don't say the whole thing.

you might need #include <string.h>

also you need to declare the variable 'string' if you haven't already, char sintrg[ 10 ] = "thestring";

edit: sorry, i misread your original post. i don't believe you can capture a pid started through a call to system().

then again, on a Unix system you can make a system() call to "ps -aux", capture...

a call by value passes only the-value-of a variable, while a call by reference passes a reference (address usually) to a variable so that it's value can be altered

fyi: no-one's code is actually right. in this case char **argv and char *argv[] accomplish the same thing. char* argv[] just means an array of character pointers, each pointer being the base address...