There is a better algorithm, which needs at most 6 iterations to converge to maximum precision for double numbers: Algorithm starts with 1 as first approximation for square root value. Then, on each step, it improves next approximation by taking average between current value y and x/y. If y = sqrt(x), it will be the same. If y > sqrt(x), then x/y < sqrt(x) by about the same … Read more
You need to have in the header file too.The forward declaration on it’s own doesn’t do enough. Also strongly consider header guards for your header files to avoid possible future problems as your project grows. So at the top do something like: This will prevent the header file from being #included multiple times, if you … Read more
Your code is missing a int main(void) function in which all of your code should be inside. By definition, a C++ program is required to have a int main(void) function. You need to put all your code inside the int main(void) function. Also, your cin << and cout << statements are missing the namespace tag std::. Therefore, you need to add the std:: at every instance you use cin or cout See the code … Read more
Your commands are wrong ! Go to the directory where your main.cpp file is, and try the following. then you’ll no longer need to copy the DLLs (for your Hello World program). Other notes: The MinGW installation instructions recommends setting to the PATH environment variable. Normally the linker options should work (try all 3 of them at … Read more
There is an idiomatic way for printing a vector out. This way is safe and doesn’t require you to keep track of the vectors size or anything like that. It is also easily recognisable to other C++ developers. This method works on other container types too that do not allow random access. This works both … Read more
Include <vector> in your Hero.h header and consider removing it from your Hero.cpp file as mentioned in the comments below.
ios::out is the default mode for std::ofstream, it means that output operations can be used (i.e. you can write to the file). ios::app (short for append) means that instead of overwriting the file from the beginning, all output operations are done at the end of the file. This is only meaningful if the file is also open for output. … Read more
You have a circular include dependency. Collision.h includes Player.h and vice versa. The simplest solution is to remove #include “Collision.h” from Player.h, since the Collision class is not needed in the Player declaration. Besides that, it looks like some of your includes in Collision.h can be replaced by forward declarations: You can then put the includes in Collision‘s implementation file.
A .gch file is a precompiled header. If a .gch is not found then the normal header files will be used. However, if your project is set to generate pre-compiled headers it will make them if they don’t exist and use them in the next build. Sometimes the *.h.gch will get corrupted or contain outdated information, so deleting that file and … Read more
Write it like this: And similarly for other member functions. But you’ll run into another problem – declarations and definitions of a template can’t be separated to different files.