c++ - Return codes for int main - is there a cap? -

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this question has answer here:

i have been playing around return codes today created loop in bash test out:

for rc in {1..300}     echo "int main(void) { return $rc; }" > test.cpp     g++ test.cpp -o test     ./test     echo $? done

however after reaching 255 seems begin 0 again. why that?

eg:

252 253 254 255 0 1

because return codes in posix-compliant systems limited range [0-255].

with regard bash, here handy reference on exit statuses.


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