Forward declaration or complete definition required
1473
When can I use a forward declaration?
71645
Why is declaration of the variable required inside a for-each loop in java
71550
Forward vs Forwards
7916
must declare a body because it is not marked abstract or extern? C#/ASP.NET
55296
How to make a declaration from a command?
26675
Can I tell the compiler to consider a control path closed with regards to return value?
152538
What is causing undefined control sequence?
81041
Why an abstract class implementing an interface can miss the declaration/implementation of one of the interface's methods?
48455
C variable declarations after function heading in definition
85936
include, include_once, require or require_once?
24136
When should I use the "strictfp" keyword in java?
113731
Why must a final variable be initialized before constructor completes?
112854
Does Python have class prototypes (or forward declarations)?
125390
Should I include every header?
62409
What is the difference between a definition and a declaration?
63053
Defining a variable with or without export
118110
Forward declaration of nested types/classes in C++