about return value

[talentspsp]

For C++ programmers, if a function needs to return a value to indicate MULTIPLE status, such like success and different situations of failure(more than one, so can't return bool), what value should be returned to indicate success in "c++ standard"? Is there such standard?

[HarryCummings]

Why is that sort of return supposed to be "standard" ?
Return is return.
"Switch" to select cases for return code that might be predefined as const and documented for references

[D_Drmmr]

For C++ programmers, if a function needs to return a value to indicate MULTIPLE status, such like success and different situations of failure(more than one, so can't return bool), what value should be returned to indicate success in "c++ standard"? Is there such standard?

You can use an enum, but you'll have to be careful to prevent name clashes, since the values defined in an enum are identifiers in the same scope as the enum. To prevent this, you could use http://www.boost.org/doc/libs/1_46_1..._emulation.hpp.

enum ReturnValue {
    Success,
    Failure1,
    Failure2
};
ReturnValue foo();

[talentspsp]

Why is that sort of return supposed to be "standard" ?
Return is return.
"Switch" to select cases for return code that might be predefined as const and documented for references

Thanks for your response. Because in C convention, people tend to return 0 for success, but in C++ some functions will return false for fail, so I am not sure what should I return for success and let it make sense for most people now.

[Lindley]

Return whatever you like; just make sure it's well-documented.