Bool Syntax Error
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Intellisense Identifier "bool" Is Undefined
Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a redeclaration of c++ built-in type ‘bool’ community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Why does VS2010 give syntax errors when syntax is correct? up vote 3 down vote error c2061 syntax error identifier favorite 1 I am having a problem with VS2010 (and VS2008) giving my a great list of syntax errors. However, the syntax is indeed correct. Here is a small example; I have the following code block inside a .h file // Prototype Declarations LIST* createList (int (*compare) (void*, void*)); LIST* destroyList (LIST* plist); int addNode (LIST* pList, void* dataInPtr); bool removeNode (LIST* pList, void* keyPtr, void** dataOutPtr); bool searchList (LIST* pList,
Bool Type In C
void* pArgu, void** pDataOut); bool retrieveNode (LIST* pList, void* pArgu, void** dataOutPtr); bool traverse (LIST* pList, int fromWhere, void** dataOutPtr); int listCount (LIST* pList); bool isListEmpty (LIST* pList); bool isListFull (LIST* pList); LIST is a typedef'd struct, FYI. All of these function declarations appear to be correct syntax. Yet, when attempting to build, I get the following syntax errors starting at the first bool function, going down the list. Error 2 error C2059: syntax error : ';' I'm failing to see where the problem lies. Again, this is just a small example. I also receive syntax errors such as the following bool found; Error 29 error C2065: 'bool' : undeclared identifier I'm truly at a lost on this one. The code posted here isn't my own, it's from a data structures book, but again it looks correct. Any help would be appreciated. Thanks! c visual-c++ boolean visual-c++-2010 share|improve this question edited Apr 23 '11 at 16:50 James McNellis 244k46708847 asked Apr 15 '11 at 0:47 Neeko 768623 .c or .cc/.cpp file extension? On the file including the .h, that is. –Matthew Iselin Apr 15 '11 at 0:48 check the lines around the code that is giving you issues, and, check the header files (they often
Windows Desktop Development > C++ Standards, Extensions, and Interop Question 0 Sign in to vote I don't know if this forum is only for C++ and not for C, but I ask bool in c anyway. I am making a program in C Win Api using Visual Studio C++ Exress c++ boolean 2010 and need to use a library and a header file that use bool variables. When trying to compile, I get a lot of syntax errors because of the bool variables. Stdbool.h is not in the list of available header files, and even if I try to copy stdbool.h into the directory for the header files it http://stackoverflow.com/questions/5671312/why-does-vs2010-give-syntax-errors-when-syntax-is-correct doesn't work. I have also tried some typedef commands, but get syntax errors. So, I am really stuck and don't know what to do except starting to program in C++. I wondered therefore if anyone knew a way around this. Thanks in advance. Sincerely Keitel Edited by Vahmat Thursday, October 04, 2012 6:47 AM Thursday, October 04, 2012 6:46 AM Reply | Quote Answers 1 Sign in to vote Visual C supports the https://social.msdn.microsoft.com/Forums/vstudio/en-US/24b11488-dbf9-4ed9-a871-105968a6970f/big-problem-with-bool-variables-in-c?forum=vclanguage language as described by the C90 standard. Microsoft did not any of the features in C99 or later (such as stdbool.h). Where did you get a copy of stdbool.h from that you attempted to use? What were the exact error messages you received? If you showyour typedefdelcarationsand how you attempted to use them, we can probably help you make them work. Marked as answer by Elegentin XieMicrosoft contingent staff, Moderator Monday, October 15, 2012 10:37 AM Thursday, October 04, 2012 7:19 AM Reply | Quote 1 Sign in to vote You really can't copy a header developed for a different compiler into Visual C and expect it to work. System provided headers tend to very system specific. However, in VC 2010 Express, I inserted your typedef and used the three tokens to define a few objects. Even though theEDITOR flagged false, true, and bool in the typedef just as you described, theCOMPILER had no problem. Given the blue coloring added to the three tokens, the editor obviously considers them reserved words (which they are in C++). Apparently the editor is not as sensitive to file type (.c vs .cpp) as the compiler is. By the way, I have noticed the editor do the same highlighting when a I name a C variable "this," which i
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there. It looks like you're using an ad blocker. That's okay. But we would like you to know that we are able to keep this content free and updated because we're ad supported. If you're finding our content valuable, please consider supporting us by disabling your ad blocker for just this site. Thanks, AlexLearnCpp.com 2.6 -- Boolean values and an introduction to if statements By Alex on June 9th, 2007 | last modified by Alex on July 12th, 2016 The next data type we're going to look at is the boolean data type. Boolean variables only have two possible values: true (1) and false (0). To declare a boolean variable, we use the keyword bool. 1 bool b; When assigning values to boolean variables, we use the keywords true and false. 123 bool b1 = true; // copy initializationbool b2(false); // direct initializationbool b3 { true }; // uniform initialization (C++11) Just as the unary minus operator (-) can be used to make an integer negative, the logical NOT operator (!) can be used to flip a boolean value from true to false, or false to true: 12 bool b1 = !true; // b1 will have the value falsebool b2(!false); // b2 will have the value true When boolean values are evaluated, they actually don't evaluate to true or false. They evaluate to the integers 0 (false) or 1 (true). Consequently, when we print their values with std::cout, it prints 0 for false, and 1 for true: 12345678910111213 #include