Expected unqualified-id before

Qué es unqualified-id en c++

El problema aquí es que htonl, en Linux al menos, es una macro (a veces) que se expande a __bswap32, que a su vez es una macro bastante larga (que tiene __attribute__((extensión)) como parte de ella). A las macros no les «importan» los espacios de nombres.
En primer lugar, probablemente valga la pena señalar que la función de biblioteca htonl toma, y devuelve, un uint32_t. En segundo lugar, como señala uno de los comentaristas, es una macro, al menos en Linux, y está definida como __bswap_32(x) en netinet/in.h.
b) Evitar el archivo de inclusión. Ya sea moviéndolo después de la definición de la función, o eliminándolo por completo. Tenga en cuenta que tendrá que llamar a esta función con una calificación de espacio de nombres, por ejemplo A::B::htonl, o el preprocesador la sustituirá allí también.

Unqualified-id in arduino

You are not getting lost, just misplaced. You closed the support for the «loop ()» function before the `time` loop, where it should go after it, because otherwise», while «loop is not inside any function., @chrisl
The thing is, you can: *see* that *it* lacks braces. Open the braces for «loop ()» function, for its » while (!coinInserted) «and then for its» if (coinSlotSignal < 1)`, and then close all three, one after the other. So you have» while (coinInserted)` ** * * * * out* of * the *keys* of any function definition., @timemage

Error: expected unqualified-id at end of input

And if you want to use static int EntranceMain::main(void) as the entry point of your program, then one way to do that is to tell it to your linker, i.e. give it a full, decorated name of that function. This depends on which compiler and linker you use highly, so you need to refer to the relevant documentation. But using it probably means that you need to include the startup code (e.g., CRT initialization).
Section 3.6.1, paragraph 3: «. main (3.2) shall not be used within a program The binding (3.5) of main is implementation-defined A program that declares main to be inline or static is ill. . -formed The name main is not otherwise reserved [ Example:. member function, classes, and enumerations may be called main, as may entities from other namespaces.] »
Section 3.6.1, paragraph 1: «. A program shall include a global function called main, which is the start of the designated program It is implementation-defined if a program in a separate environment is required to define a main function . «

Unqualified-id before do

Hello, thank you very much in advance for your help, I am new to programming and I am making a counter, the fact is that all the errors that popped up have been corrected except this one: error: expected unqualified-id before ‘{‘ token.
Recommendation: DON’T RUN, first take your steps one by one assembling part of the code at a time. And don’t try to put together a whole final sketch without testing the parts first. Take your time go to the Documentation and Tutorials section and see how to raise a function, how to use the IF and how to pass a variable to a function.
We get a lot of this kind of messages from new people, the problem: they don’t know where the rules are because in the Spanish forum they aren’t visible at the first thread of the Spanish forum, like we do in the main forum.