A function should never return a reference to a local object/variable since such objects go out of the scope and get destroyed when the function returns. Differently, the function can return a const or non const reference to an object whose scope is not limited by the function context. Typical example is a custom operator<<: Unfortunately, returning-by-value has … Read more
You meant to type: And you also need to delete[] collection (or you’ll leak this memory). It would be better use std::vector<std::string> collection; and avoid the raw pointer usage altogether:
The steps: The autogen.sh script generates the configure script (from configure.ac, using autoconf) and any files it needs (like creating Makefile.in from Makefile.am using automake). This requires autotools to be installed on your system, and it must be run when checking out the project from source control (if configure isn’t checked in). People who download source tarballs can usually skip this step, because output of this … Read more
It’s a specialization. template<> means that the specialization itself is not templated- i.e., it is an explicit specialization, not a partial specialization.
On a 64-bit Windows system, the reading of the various environment variables and some Windows Registry keys is redirected to different sources, depending whether the process doing the reading is 64-bit or 32-bit. The table below lists these data sources: So for example, for a 32-bit process, the source of the data for the %ProgramFiles% and %ProgramFiles(x86)% environment variables is the … Read more
PaulR has the right suggestion. You have to run through the code by “hand” (using whatever tools you want – debuggers, paper, logging function calls and variables at certain points) until you understand it. For an explanation of the code I’ll refer you to quasiverse’s excellent answer. Perhaps this visualization of the call graph with … Read more
Possible Duplicate:How to pass objects to functions in C++? In my game I make excessive use of mathematical vectors and operator overloading of them. That’s basically all about my Vector class (methods excluded). I am not an expert in C++ and I’ve seen and read about passing as const and passing by reference. So, where … Read more
Please take a look here: RS-232 for Linux and Windows 1) Windows Serial Port Programming 2) Using the Serial Ports in Visual C++ 3) Serial Communication in Windows 1) You can use this with Windows (incl. MinGW) as well as Linux. Alternative you can only use the code as an example. 2) Step-by-step tutorial how … Read more
You need to use std::setw in conjunction with std::right.
change: to: