Working with header files

Wait no more, start learning today! Next SoundPool in Android with Examples. Recommended Articles. How to define whether a header cell is a header for a column, row, or group of columns or rows in HTML 5?

Article Contributed By :. Easy Normal Medium Hard Expert. Writing code in comment? Please use ide. Like Article. Previous How to write your own header file in C?

Next A nested loop puzzle. Recommended Articles. Article Contributed By :. Easy Normal Medium Hard Expert. The declaration tells the compiler whether the element is an int , a double , a function , a class or some other thing.

Furthermore, each name must be declared directly or indirectly in every. When you compile a program, each. The compiler has no knowledge of what names are declared in other compilation units. That means that if you define a class or function or global variable, you must provide a declaration of that thing in each additional.

Each declaration of that thing must be exactly identical in all files. A slight inconsistency will cause errors, or unintended behavior, when the linker attempts to merge all the compilation units into a single program.

You make the declarations in a header file, then use the include directive in every. I believe the issue is that you aren't linking the calculator files with the main when compiling. Try this:. If you are not linking the the files with main correctly, then you won't be able to compile it correctly.

Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Asked 8 years, 6 months ago.