Error Does Not Name A Type Class
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Error Does Not Name A Type Arduino
Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a error does not name a type typedef minute: Sign up Class name does not name a type in C++ up vote 7 down vote favorite 2 I just started programming in C++, and I've tried to create 2 classes where one will contain the other. File A.h: #ifndef
Does Not Name A Type C++ Struct
_A_h #define _A_h class A{ public: A(int id); private: int _id; B _b; // HERE I GET A COMPILATION ERROR: B does not name a type }; #endif File A.cpp: #include "A.h" #include "B.h" #include
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Does Not Name A Type Qt
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Variable Does Not Name A Type C++
Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up '[Class c++ does not name a type typedef name]' does not name a type in C++ up vote 2 down vote favorite I am programming a graph using a list of lists. For that, I have two classes, and each one of this classes has a pointer to another object http://stackoverflow.com/questions/3608305/class-name-does-not-name-a-type-in-c of the same class and a pointer to the object of the second class. Here is the code: File V.h: #ifndef VERTICEPUNT_H #define VERTICEPUNT_H #include "A.cpp" typedef char E; class V { public: E etiqueta; V* siguiente; A* primera; //<- Error: 'A' does not name a type V(); ~V(); }; #endif // VERTICEPUNT_H File V.cpp: #include "V.h" V::V() { etiqueta = ' '; siguiente = 0; primera = 0; //<- Error: 'primera' was not declared in this scope } V::~V() { delete primera; delete http://stackoverflow.com/questions/17333934/class-name-does-not-name-a-type-in-c siguiente; } File A.h: #ifndef ARISTAPUNT_H #define ARISTAPUNT_H #include "V.cpp" typedef int P; class A { public: P peso; V* vertice; A* siguiente; A(); ~A(); }; #endif // ARISTAPUNT_H A.cpp: #include "A.h" A::A() //<- Error: 'A' does not name a type { peso = 0; siguiente = 0; vertice = 0; } A::~A() // <- Error: 'A' does not name a type { delete siguiente; } How would I be able to fix that? class compiler-errors declaration share|improve this question asked Jun 27 '13 at 3:12 J-orge Mata Villalobos 24115 add a comment| 1 Answer 1 active oldest votes up vote 4 down vote accepted The message means that the class name is not in scope. V.h should not include A.cpp, it should include A.h. Same goes for A.h inclusion of V.cpp. In general, you never want to #include a CPP file - from a header or from another CPP file. Only .h header files are designed for inclusion by preprocessor. In case of circular definitions like this, you should forward-declare the class the pointer to which you are defining, and forego inclusion of that class's header: #ifndef VERTICEPUNT_H #define VERTICEPUNT_H class A; // <<== Forward declare the class. typedef char E; class V { public: E etiqueta; V* siguiente; A* primera; V(); ~V(); }; #endif // VERTICEPUNT_H share|improve this answer answered Jun 27 '13 at 3:16 dasblinkenlight 455k39492843 I tried that, and it fixes the errors. However, I get a couple of warnings, like possible problems when invoking ~V
download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript). Home https://forum.qt.io/topic/46452/solved-need-help-error-class-does-not-name-a-type Qt Development General and Desktop [SOLVED]Need Help: Error " 'CLASS' does not name a type" [SOLVED]Need Help: Error " 'CLASS' does not name a type" http://arduino.stackexchange.com/questions/12304/arduino-raise-the-error-does-not-name-a-type-when-an-object-is-used-outside-o This topic has been deleted. Only users with topic management privileges can see it. GeorgePopov last edited by I have default mainwindow class: mainwindow.h and mainwindow.cpp. does not I also have my own class Sprite: sprite.h and sprite.cpp. I want to create the object of Sprite class in mainwindow.h but I've got an error : "'Sprite' does not name a type'". I included header file "sprite.h" in mainwindow.h but problem is still there! Here is my mainwindow.h @#ifndef MAINWINDOW_H #define does not name MAINWINDOW_H #include
a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Arduino beta Questions Tags Users Badges Unanswered Ask Question _ Arduino Stack Exchange is a question and answer site for developers of open-source hardware and software that is compatible with Arduino. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Arduino raise the error: `does not name a type` when an Object is used outside of the main two blocks setup and loop up vote 0 down vote favorite I have this: class Person{ public: int age; }; Person p; p.age; void setup() { ... } void loop() { ... } And I got this error: Compiling 'MyProgram' for 'Arduino Mega w/ ATmega2560 (Mega 2560)' MyProgram.ino:18:1: error: 'p' does not name a type Error compiling But is I use the Person instance inside setup or loop functions it compiles find. void setup() { // initialize digital pin 13 as an output. Person p; p.age; } I got this: Compiling 'MyProgram' for 'Arduino Mega w/ ATmega2560 (Mega 2560)' Binary sketch size: 4,674 bytes (used 2% of a 253,952 byte maximum) (3.45 secs) Minimum Memory Usage: 428 bytes (5% of a 8192 byte maximum) What is the different? Why the instance only can be used into the blocks? I also declared a file with a simple class and then create a instance of it class outside the blocks and I got the same error. If I put the instance inside the blocks it works. So, any tips? arduino-mega variables class share|improve this question asked Jun 2 '15 at 0:19 Robert 11919 add a comment| 2 Answers 2 active oldest votes up vote 1 down vote accepted As you have already noticed, you cannot call methods of a class, nor access its properties, outside a "block" (as you call it). More specifically