Cout Error C2065 Undeclared Identifier
here for 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 error c2871 std a namespace with this name does not exist posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join
Error C2653 Std Is Not A Class Or Namespace Name
the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes error c2065 endl undeclared identifier a minute: Sign up C++ cout gives undeclared identifier up vote 4 down vote favorite So, I have this question. Why does cout throws error C2065: 'cout' : undeclared identifier I am using Visual Studio 2012 as an IDE and I error c2039 cout is not a member of std am writing a school project. I have everything done except an example file. So I am trying to write something on the screen like this: #include "iostream" #include "stdafx.h" using namespace std; int main() { cout<<"example"; return 0; } So the problem is with cout... printf works fine, but I want to use cout. EDIT: I've changed "" to <> but it is not helping. Also I am using this code only for example... This is not the whole project. c++
Error Lnk2019 Unresolved External Symbol Winmain 16 Referenced In Function Tmaincrtstartup
cout share|improve this question edited May 31 '13 at 13:55 asked May 31 '13 at 13:41 Dekay 73111 Try #include –Andy Prowl May 31 '13 at 13:42 And use std::cout or use the namespace. –Dirk May 31 '13 at 13:42 4 I believe the precompiled header must be the first line in the source. –chris May 31 '13 at 13:49 @chris Yes, assuming the project actually uses precompiled headers. –Angew May 31 '13 at 13:49 2 @Angew, Well, judging by the stdafx.h in the source, I figured it did. –chris May 31 '13 at 13:50 | show 2 more comments 4 Answers 4 active oldest votes up vote 10 down vote accepted stdafx.h shall be the first include directive in your source file. Switch files and convert the second include to <>, as other suggested. #include "stdafx.h" #include See this post for more information. share|improve this answer answered May 31 '13 at 13:53 Matthieu Rouget 2,016720 1 thx, I just found that out by myself, but you are the only one with the actual fix :D :D –Dekay May 31 '13 at 13:57 @user2440586, To be fair, it is a lot better to use angle brackets when including standard headers. –chris May 31 '13 at 14:04 add a comment| up vote 11 down vote First of all: #include instead of #include "iostream" Secondly, it is generally considered bad p
here for 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 error c2143 syntax error missing before string Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation error c2065 cin undeclared identifier Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like
Error C2065 Printf Undeclared Identifier
you, helping each other. Join them; it only takes a minute: Sign up Error: 'cout' : undeclared identifier; though I've included iostream header file in program up vote 7 down vote favorite 1 I am trying to http://stackoverflow.com/questions/16858717/c-cout-gives-undeclared-identifier compile the simple program below. But, it's not compiling & gives error: error C2065: 'cout' : undeclared identifier I want to ask you that why this program doesn't work though I've included iostream header file in it? #include void function(int) { cout << “function(int) called” << endl; } void function(unsigned int) { cout << “function(unsigned int) called” << endl; } int main() { function(-2); function(4); return 0; } Thanks in advance. c++ namespaces iostream cout http://stackoverflow.com/questions/21276217/error-cout-undeclared-identifier-though-ive-included-iostream-header-file share|improve this question asked Jan 22 '14 at 6:58 yuvi 1541112 7 Use std::cout instead of cout only. Append std:: before everything you use from namespace std. –sgarizvi Jan 22 '14 at 6:59 Or in a case like this - when you write a very simple program, you can always write using namespace std; somewhere below your #include . It will inform the compiler to look for cout in std namespace, thus allowing your cout to work. Although this is considered a bad practice whatsoever. –Mateusz Kołodziejski Jan 22 '14 at 7:03 Avoid using namespace std;. That is guaranteed to bite you one day. If you don't want to type std::cout, use using std::cout, but limit it to a small scope, and don't use it in headers. –juanchopanza Jan 22 '14 at 7:06 There is more on the using namespace std issue here: stackoverflow.com/questions/1452721/… –juanchopanza Jan 22 '14 at 7:20 add a comment| 2 Answers 2 active oldest votes up vote 13 down vote accepted The cout stream is defined in the std namespace. So to name it you write: std::cout If you want to shorten this to cout then you can write using namespace std; or using std::cout; before writing cout. Any good documentation source will tell you which namespace contains an object. For instance: http://en
here for 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 http://stackoverflow.com/questions/17499381/why-are-all-couts-and-cins-undeclared-identifiers ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the https://www.daniweb.com/programming/software-development/threads/245344/error-c2065-cout-undeclared-identifier 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 minute: Sign up Why are all cout's and cin's "undeclared identifiers up vote -3 down vote favorite In my main.cpp all of my cout's and cin's have errors. /** * Description: This program demonstrates a very basic String class. It creates * error c2065 a few String objects and sends messages to (i.e., calls methods on) * those objects. * */ //#include #include "mystring.h" //using namespace std; /* Function Prototypes */ void Display(const String &str1, const String &str2, const String &str3); /*************************** Main Program **************************/ int main() { String str1, str2, str3; // Some string objects. char s[100]; // Used for input. // Print out their initial values... cout << "Initial values:" << endl; Display(str1, str2, str3); My main.cpp cannot not be changed, so my is not a question is, how can I fix this error, what do I have to add to my header file and implementation file? c++ share|improve this question asked Jul 6 '13 at 3:25 Joe 1917 7 Because you've commented out both #include and using namespace std;? –Oliver Charlesworth Jul 6 '13 at 3:28 add a comment| 2 Answers 2 active oldest votes up vote 4 down vote accepted In my main.cpp all of my cout's and cin's have errors. You simply need to include header file, and use std with cout and cin: #include //^^ int main() { std::cout << "Initial values: "<< std::endl; //^^ } share|improve this answer answered Jul 6 '13 at 3:27 taocp 17k52950 wow, I feel stupid but instead of using std, can't I just use using namespace std;? –Joe Jul 6 '13 at 3:28 @Joe You can do using namespace std, but it is considered bad practice. so it is better to use std::cout –taocp Jul 6 '13 at 3:29 @Joe: Just to further elaborate, there is a good reason why you shouldn't use that. Say you download a C++ library that has a cout function. The compiler could confuse the two. And, if you liked this answer, you should accept it. –kirbyfan64sos Jul 6 '13 at 3:46 Hmm, thats pretty neat, I never knew that "using namespace std;" could have a draw back. –Joe Jul 6 '13 at 3:49
'cout' : undeclared identifier Donate $1 now to see this question answered quickly Sponsored questions offer a monetary incentive to answerers to produce quality responses. Be intelligently matched with 5 likely answerers who will be alerted to help. 6Contributors 21Replies 25Views 6 YearsDiscussion Span 5 Years Ago Last Post by EEBlake 0 6 Years Ago I havent programmed in C++ for about 3 years.. Since i started uni actually.. Now i gotta implement some stuff for Algorithms and Complexity.. I've got a vague idea of how to do that but thats not my problem.. According to my memory and old programs that i dug up for my hard disk the following code should not be wrong.. But it is.. At the moment im working on Windows XP with Microsoft Visual Studio 2008.. I've tried various versions of the std thingy like std::cout << "sfsd"; using namespace std; include "stdafx.h" but nothing works.. Heres the first program i did on c++ which now isnt working :p #include #include #include "stdafx.h" int main() { cout << "Hello World /n"; return 0; } They say understanding of the Artificial Intelligence brings understanding of God.. amzyz 9 posts since Nov 2009 Community Member c++ 0 JasonHippy 724 6 Years Ago Try this: #include using namespace std; int main() { cout << "Hello World /n"; return 0; } 0 jonsca 1,059 6 Years Ago #include to get the standard header. Then you need either using std::cout; at the top or qualify it in the body of your code with std::cout <<"Yada"; You can also go the using namespace std; route but that brings its own problems. EDIT: Dang... JH, does someone start a stopwatch when we begin posting? 0 Nick Evan 4,005 6 Years Ago cout << "Hello World /n"; Actually this might give you a more 'expected' result: cout << "Hello World \n"; /n is not the same as \n :) 0 Discussion Starter amzyz 6 Years Ago Try this: #include using namespace std; int main() { cout << "Hello World /n"; return 0; } I've tried what you said Jason and i get: fatal error C1010: unexpected end of file while looking for precompiled header. Did you forget to add '#include "stdafx.h"' to your source? and when i do include that library i get the first error again 0 Discussion Starter amzyz 6 Years