Returning from main()

[Scotsgeek]

Please check the current issues Many bug reports are duplicates, this just creates more work for us. Searching the issues first may give you your answer or a workaround! If not adding new information to an existing report is much more helpful than a new report.

What Course are you in Thinkcpp

What Page were you on 5.9 Returning from main

What is your username None

Describe the bug "The usual return value from main is 0, which indicates that the program succeeded at whatever it was supposed to do. If something goes wrong, it is common to return -1, or some other value that indicates what kind of error occurred."

Not correct!

The actual value returned to the O/S from main() is actually a 1 byte unsigned value, 0 - 255, even though main() returns an int. So returning -1 from main(), you are actually returning 255!

In stdlib.h, two macros are defined that are commonly used to return from main() or any other function:

"#define EXIT_SUCCESS 0" "#define EXIT_FAILURE 1"

-1 is used for other purposes such as EOF, or "End Of File", or some other error condition.

See: man EOF

Traceback None

Javascript Errors None

[bnmnetp]

Thanks for the report.

I'd be happy to have someone submit a PR that modifies the wording on the page and makes the fill in the blank accept a variety of answers.