D:\rcs>perl rcs.pl 0


--- Executing cmd 'rcs_c.exe ' via system

Hello World!
Return with code 0
--- Execution finished with return code: 0


--- Executing cmd 'rcs_c.exe ' via backticks
--- Execution finished, and returned:

Hello World!
Return with code 0



bye...

D:\rcs>perl rcs.pl -1


--- Executing cmd 'rcs_c.exe -1' via system

Hello World!
Returning with code -1
i = -10
Can't spawn "rcs_c.exe -1": No error at rcs.pl line 8.
--- Execution finished with return code: 255


--- Executing cmd 'rcs_c.exe -1' via backticks
--- Execution finished, and returned:

Hello World!
Returning with code -1
i = -10



bye...

D:\rcs>perl -e "system(qq(rcs_c.exe -1))"
Hello World!
Returning with code -1
i = -10