A pointer is an address of a variable. Imagine ram as consecutive boxes. Each box has an address. Now in your example. int a = 8; //declares a variable of type int and initializes it with value 8 int *p1; //p1 is a pointer meaning that the variable p1 holds an address instead of a … Read more
Sorry, the problem was that the reference was sent to a external library and the define for my type was different in the external library. solved Passing value as reference [closed]
Function declaration is not matched with function definition. Declaration: int ERPSGame(); Definition int ERPSGame(int argc, const char *argv[]) In Dev-C++, under Tools -> Compiler Options, put “-Wall” in the “…commands when calling compiler” box. It will be helpful for you to get warnings and do effective coding and saves your time too. 3 solved Im … Read more
The problem is in foreach templated function: first parameter can be a pointer to the array or it can just be static array array with undefined size second parameter can be a function pointer or a reference to the function (which should accept constant element of same type as array elements by reference, as it … Read more
In general, returning a reference avoids that the return value gets copied, and (if it is not const-qualified) gives you the opportunity to change the “original” value. A return type const T& is often used in conjunction with objects of class type, e.g. std::vector, where copying could result in (unwanted) overhead. In conjunction with elementary … Read more
first, create 3 columns. id, name, then the url. then output it like this <a href=”https://stackoverflow.com/questions/25077589/$url”><p>$name</p></a> But I would like to tell you frankly that this question is very basic, this forum may hinder you from learning if you did not challenge yourself. 🙂 2 solved PHP/MySQL text and reference [closed]
It looks like you’re looking for Reflection Example: public class A { int integer{get; set;} } PropertyInfo prop = typeof(A).GetProperty(“integer”); A a = new A(); prop.GetValue(a, null); prop.SetValue(a, 1234, null); You still need a reference to set/get values, but this seems about what you’re wanting. 1 solved How to store reference to Class’ property and … Read more
In Java we can have (non-static) inner-classes, which seem to “behave” like having a strong-reference to their container-class and/or owner-class, but without causing memory-leak. I mean, I observed that even if both owner-class and inner-class keep strong-reference to each other, the classes are garbage-collected anyway (once no external class references them, although having reference-recursion). Yes, … Read more
As the compiler is telling you, this line: Note n = Note(&track.generator); Tries to construct a Note and supply a Generator** to its constructor (since track.generator has type Generator*, &track.generator has type Generator**). However, your Note class constructor accepts a Generator*, not a Generator**. Just do this instead (notice, that copy-initialization is unnecessary here, rather … Read more
The localtime function is not thread-safe and more importantly not reentrant. The pointer it return is most likely a pointer to an internal static buffer. This means that each localtime call returns the very same pointer to the very same “buffer” (structure). In fact, if you read the linked reference, the buffer (structure) can be … Read more
Let’s look at what HardToFollow() receives and follow its flow line-by-line. [I’ll just note right here that this code is, in fact, very hard to follow, so it’s possible I’ve made a mistake. Please follow my logic carefully to see if you agree.] At the start of HardToFollow(): q-in-main = address of trouble[1] (value = … Read more