There are several ways, but first you need to understand why object cleanup is important, and hence the reason std::exit is marginalized among C++ programmers. RAII and Stack Unwinding C++ makes use of a idiom called RAII, which in simple terms means objects should perform initialization in the constructor and cleanup in the destructor. For instance the std::ofstream class [may] … Read more
Your compiler just tried to compile the file named foo.cc. Upon hitting line number line, the compiler finds: or The compiler then tries to find that file. For this, it uses a set of directories to look into, but within this set, there is no file bar. For an explanation of the difference between the versions of the … Read more
There is a misconception here with what const means, probably because it’s a little confusing that this works: but this doesn’t: The issue is that the array size in an array declaration must be a core constant expression. Simplified, that means an expression that’s evaluatable at compile time to be a constant. That is true in the … Read more
By the way, use qualified-names such as std::getline, std::ifstream like I did. It seems you’ve written using namespace std somewhere in your code which is considered a bad practice. So don’t do that: Why is “using namespace std” considered bad practice?
It returns a reference to an int. References are similar to pointers but with some important distinctions. I’d recommend you read up on the differences between pointers, references, objects and primitive data types. “Effective C++” and “More Effective C++” (both by Scott Meyers) have some good descriptions of the differences and when to use pointers vs references. … Read more
Cling What is Cling? Cling is an interactive C++ interpreter, built on the top of LLVM and Clang libraries. Its advantages over the standard interpreters are that it has command line prompt and uses just-in-time (JIT) compiler for compilation. Many of the developers (e.g. Mono in their project called CSharpRepl) of such kind of software … Read more
include_directories(x/y) affects directory scope. All targets in this CMakeList, as well as those in all subdirectories added after the point of its call, will have the path x/y added to their include path. target_include_directories(t x/y) has target scope—it adds x/y to the include path for target t. You want the former one if all of your targets use the include directories in … Read more
You need a ; after the class declaration. Since you don’t have it, the class is not yet declared when the compiler reaches Stopwatch::Stopwatch(), thus complaining it’s a new type.
Is there a c++ equivalent of Java’s I am trying to debug Java/jni code that calls native windows functions and the virtual machine keeps crashing. The native code appears fine in unit testing and only seems to crash when called through jni. A generic exception catching mechanism would prove extremely useful.
Decimal to hex :- Hex to decimal :- Ref: std::hex, std::stringstream