A very simple enum class error in C++

Question

That's my code :

enum class MyEnum
{
    EnumValue1,
    EnumValue2 = 10,
    EnumValue3
};
int main()
{
    MyEnum value1 = MyEnum::EnumValue1;
    return 0;
}

when i compile this code i get an error code

error: 'MyEnum' is not a class or namespace

what's wrong is with it ?

https://stackoverflow.com/questions/5188554/my-enum-is-not-a-class-or-namespace — msc, Jul 12 '17 at 12:46
Do you know how to change your compiler in code::blocks. if yes then change it to c++11 or higher. enum class is only available in c++11 and above. if not look here to [learn how to change the compiler option](https://stackoverflow.com/questions/12808650/how-can-i-update-codeblocks-to-use-tdm-gcc) — Seek Addo, Jul 12 '17 at 13:05

score 1 · Accepted Answer · answered Jul 12 '17 at 13:34

1

Simply tell g++ to follow the C++11 standard.

To do this in Code::Blocks, go to Project -> Build options and in the Compiler settings -> Compiler Flags tab, check "Have g++ follow the C++11 ISO C++ language standard" (make sure to change the behavior of g++ for the entire project, not only for the active target).

answered Jul 12 '17 at 13:34

J-M. Gorius

606
4
15

what u mean with (make sure to change the behavior of g++ for the entire project, not only for the active target) ?, can u explain ? – Adel Benhamida Jul 12 '17 at 13:41
When opening the project's *Build Options*, on the left hand side there is a tree where you can select *ProjectName*, *Debug* or *Release*. In order for your modification to be global (and thus to be independant of the build target), you should select **ProjectName** in the tree before changing anything. – J-M. Gorius Jul 12 '17 at 13:44
thank you, I checked "Have g++ follow the C++11 ISO C++ language standard" in Project -> ....... and also checked it in Settings -> Compiler Settings ..... , i had to check it in both places to made it works . – Adel Benhamida Jul 12 '17 at 13:46
2

Also consider installing mingw-w64 (for some reason, C::B still distributes the old defunct mingw) – M.M Jul 12 '17 at 13:50
@AdelBenhamida I'm glad it helped. – J-M. Gorius Jul 12 '17 at 13:53

A very simple enum class error in C++

1 Answers1