Java can be installed anywhere, and there is no guarantee that you should be able to see, where. So, the general answer to your question, is “it is impossible”, or that “you had to run a recursive file search for jvm.dll on your whole filesystem”. But this is not, what you want. I think, you want to get a … Read more
You have to use That is because even if it is true that your grid is a pointer, you have allocated in the are pointed by its memory an array of Square object. So when you use the [] operator you are obtaining an object of type Square and not a Square* and for a Square object you hve to use the . operator and … Read more
This works by returning a plus something, where something is between 0 and b-a which makes the end result lie in between a and b.
‘\0′ equals 0. It’s a relic from C, which doesn’t have any string type at all and uses char arrays instead. The null character is used to mark the end of a string; not a very wise decision in retrospect – most other string implementations use a dedicated counter variable somewhere, which makes finding the end of … Read more
It’s compiling because printf isn’t type safe, since it uses variable arguments in the C sense1. printf has no option for std::string, only a C-style string. Using something else in place of what it expects definitely won’t give you the results you want. It’s actually undefined behaviour, so anything at all could happen. The easiest way to fix this, since … Read more
Unlike static member functions or free functions, non-static member functions won’t implicitly convert to member function pointers. (emphasis mine) An lvalue of function type T can be implicitly converted to a prvalue pointer to that function. This does not apply to non-static member functions because lvalues that refer to non-static member functions do not exist. So you need to use & explicitly to … Read more
hash_set is an extension that is not part of the C++ standard. Lookups should be O(1) rather than O(log n) for set, so it will be faster in most circumstances. Another difference will be seen when you iterate through the containers. set will deliver the contents in sorted order, while hash_set will be essentially random (Thanks Lou Franco). Edit: The C++11 … Read more
There are quite a few projects that have settled on the Generic Graphics Toolkit for this. The GMTL in there is nice – it’s quite small, very functional, and been used widely enough to be very reliable. OpenSG, VRJuggler, and other projects have all switched to using this instead of their own hand-rolled vertor/matrix math. I’ve found … Read more
There are many solutions, here’s a few I’ve come up with:
You forget the tricky 2nd difference between classes and structs. Quoth the standard (§11.2.2 in C++98 through C++11): In absence of an access-specifier for a base class, public is assumed when the derived class is declared struct and private is assumed when the class is declared class. And just for completeness’ sake, the more widely known difference between class and … Read more