You have a cyclical dependency. Both files need one another to compile. Try forward-declaring User in group: Group.cpp Then in the Group.cpp file, include User. You can forward declare in the header anytime the object size doesn’t depend on the actual size of the object your forward declaring. In this case, (in Group) you use … Read more
I had exactly the same problem right after switching off some (in my opinion unneccessary) Windows services. It turned out that when I switched ON again the “Application Experience” everything resumed working fine. May be you simply have to turn on this service? To switch ON Application Experience: Click the Windows start buttonn. In the … Read more
You can’t put the class declaration in the .cpp file. You have to put it in the .h file or else it’s not visible to the compiler. When main.cpp is compiled the type “first” is class first;. That’s not useful at all because this does not tell anything to the compiler (like what size first is … Read more
I’m learning C++ with Code::Blocks, and everytime i try to create a new class, I get an error message saying: Here’s the code I’ve been using: Main Class Lime Class (.ccp): Lime Header (.h): If someone knows, how to fix it, please, tell me!
check that “filename.exe” is not running, I guess you are using Microsoft Windows, in that case you can use either Task Manager or Process Explorer : http://technet.microsoft.com/en-us/sysinternals/bb896653 to kill “filename.exe” before trying to generate it.
Got it finally: In my case, the problem resulted from a program called EGCS (Experimental/Enhanced GNU Compiler System). I installed it as a prerequisite for PSCAD(Power Systems CAD) along with a FORTRAN Compiler. Just remove it, and you’ll be fine.(Sadly, I deleted the entire PATH environmental variable due to a mistake. So what?…I ended up … Read more
In C you have character oriented input functions (e.g. getchar, fgetc), you have formatted input functions (e.g. the scanf family) and then you have line oriented input functions. (e.g. fgets and POSIX getline). When you are reading lines of data, line oriented input functions are the proper tool for the job. (taking user input with scanf has many pitfalls that new (and even not so new) C programmers fall into) All line oriented functions read … Read more
You need to include the string library, you also need to provide a return type for your main function and your implementation may require you to declare an explicit return statement for main (some implementations add an implicit one if you don’t explicitly provide one); like so:
Your compiler’s command line contains -I -c sequence. This -I option “swallows” your -c option. -I requires an additional argument, which is an include directory name. You failed to supply that argument, which is why -I assumes that -c that follows it is the directory name. So that -I consumes that -c. The compiler never sees that -c. Without -c it assumes that you want to compile and link your program. Since Gladius.cpp does not have main in it, … Read more
When there’s no project, Code::Blocks only compiles and links the current file. That file, from your picture, is secrypt.cpp, which does not have a main function. In order to compile and link both source files, you’ll need to do it manually or add them to the same project. Contrary to what others are saying, using a … Read more