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it's always good to return an exit code from a program. the value you reply can infer wether the program executed correctly. nearly all programs return exit codes. for example...
[chris@trevor chris]$ ls hello
ls: hello: No such file or directory
[chris@trevor chris]$ echo $?
1
[chris@trevor chris]$ touch hello
[chris@trevor chris]$ ls hello
hello
[chris@trevor chris]$ echo $?
0
[chris@trevor chris]$
so from this we can tell if ls was successful or not.
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int main()
