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Returning error code needs the calling function to check for the return value. This adds another if condition to the calling code - which needs additional test case. Also the onus is on the calling code. if the calling code forgets to check for the value, then a error returned would be missed.
- Wolverine September 23, 2011Exceptions don't need the immediate calling function to catch the exception. The catch could be anywhere up the call stack. If there is none, the system catches the exception and terminates the program. Error conditions don't get missed using exceptions.