You should structure your code between .h (headers) and .cpp files (implementation). You should include header files: .h Never include .cpp files. (Unless you know what you do, and that would be in really rare cases). Otherwise you’re ending compiling several times your class, and you get the error your compiler is telling you: ‘redefinition of class…’ An additional … Read more
I’m getting the error Trying to compile a project on QtCreator. It happens when I try to create an instance of an user defined class, Layer. That class consists of a header, layer.h, and a implementation, layer.cpp. It was tested and works in another programs. On my project, it is included in qtwidget.h and the error happens when I try … 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:
EncodeAndSend is not a static function, which means it can be called on an instance of the class CPMSifDlg. You cannot write this: It should rather be called as:
The .NET Assembly loader: is unable to find 1.2.0.203 but did find a 1.2.0.200 This assembly does not match what was requested and therefore you get this error. In simple words, it can’t find the assembly that was referenced. Make sure it can find the right assembly by putting it in the GAC or in … Read more
I am trying to write a program which implements the Pop and Push functions. The problem is, I am trying to pass the pointer that points to integer Top to the function, so that this integer keeps changing, but when I try to compile I always get this line: **error: called object is not a … Read more
invalid new-expression of abstract class type ‘box’ There is nothing unclear about the error message. Your class box has at least one member that is not implemented, which means it is abstract. You cannot instantiate an abstract class. If this is a bug, fix your box class by implementing the missing member(s). If it’s by design, derive … Read more
The .NET Assembly loader: is unable to find 1.2.0.203 but did find a 1.2.0.200 This assembly does not match what was requested and therefore you get this error. In simple words, it can’t find the assembly that was referenced. Make sure it can find the right assembly by putting it in the GAC or in … Read more
The return type for stringThing must be either void or string, not both. You also must include <string>, if you want to use string. Since you want to output the return value of stringThing() in main, I guess it should be But then, you must also return a string from your function for example. Your parameter std::string &teststring won’t work with your const char* argument. So either declare … Read more
What are undeclared identifier errors? What are common causes and how do I fix them? Example error texts: For the Visual Studio compiler: error C2065: ‘cout’ : undeclared identifier For the GCC compiler: ‘cout’ undeclared (first use in this function)