CODEWITHSUNDEEP
c++eclipseubuntuubuntu-14.04
Henrique Ferrolho
Henrique Ferrolho

Reputation: 942

Eclipse C++ Warnings

I've recently formatted my computer and re-installed Ubuntu and Eclipse. Afterwards, when I opened a C++ project that was both warning and error free, Eclipse now shows me some warnings I've never seen before, such as:

Macro definition can be replaced with constexpr expression

and

Un- or ill-initialized variable found

Screenshot: enter image description here

What do these warnings mean and why are they listed? They weren't there before I re-installed Ubuntu and Eclipse...

Thanks!

Upvotes: 1

Views: 1910

Answers (1)

jasal
jasal

Reputation: 1053

Macro definition can be replaced with constexpr expression

This means, that you've used a preprocessor macro for defining a constant. You should replace this by a C++ const expression, i.e. replace #define PI 3.141 by const double PI = 3.141;.

Un- or ill-initialized variable found

That's pretty much self-explanatory. Always initialize your variables or you will get undefined behaviour.

The reason why the warning appear is probably that the new Ubuntu version you installed comes with a newer version of GCC which reports more warnings than the previous one. Another explanation would be that you are using other compiler options than before, for example -Wall.

Upvotes: 3

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