I have recently started working in C++ and came across this situation when I have to create a directory while executing my code. The code is working fine when I have to create a single folder but it fails when I have to create another folder withing this newly created folder. Suppose, I am in … Read more
You cannot directly call a non-static class method using this callback. This is because the method is expecting to be called with the class this pointer. If you don’t need any data from your class, then just make the method static. If you do need data from the class, you can make a static “stub” … Read more
It has nothing to do with your typedef. The problem is that you haven’t given a return type for main: A function must have a return type. The main function must return int.
I was wondering, why I cannot call a constructor. Even this small example fails to compile with the message: Code: I used the Cygwin g++ compiler in version 4.9.3-1. Thank you for your help.
The initialization of the static member counter must not be in the header file. Change the line in the header file to And add the following line to your employee.cpp: Reason is that putting such an initialization in the header file would duplicate the initialization code in every place where the header is included.
I made a program recently that dealt with a lot of if/else statements to return particular values. Someone recommended using lookup tables instead. My question is, How do they work and how do you implement them? What is the difference between a map, hash table, and lookup table.
Related to this I want to know what exactly is a nested name specifier? I looked up in the draft but I could understand the grammar as I haven’t taken any Compiler Design classes yet.
Compiler does not know, which overload of cb to chose.2) Even if it did know, it would not convert from void* to, say void(*)(int), without any explicit conversion. However, it can deduce it if you give compiler enough information:
You declared this at the top: So the compiler expects stringChar and stringVal functions to have no arguments. Change the declaration to:
Assuming the input image is in the following cubemap format: The goal is to project the image to the equirectangular format like so: The conversion algorithm is rather straightforward. In order to calculate the best estimate of the color at each pixel in the equirectangular image given a cubemap with 6 faces: Firstly, calculate polar … Read more