I think you are confused about how the compiler puts things together. When you use -c flag, i.e. no linking is done, the input is C++ code, and the output is object code. The .o files thus don’t mix with -c, and compiler warns you about that. Symbols from object file are not moved to other object files like that. All object … Read more
Be careful, (x1-x2)^2 will not do an exponent of 2 here. See http://www.cplusplus.com/reference/cmath/pow/. Second, you probably forgot a + in your expression:
This code returns a 2d array.
You have a cyclical dependency. Both files need one another to compile. Try forward-declaring User in group: Group.cpp Then in the Group.cpp file, include User. You can forward declare in the header anytime the object size doesn’t depend on the actual size of the object your forward declaring. In this case, (in Group) you use … Read more
Magic Enum header-only library provides static reflection for enums (to string, from string, iteration) for C++17. For more examples check home repository https://github.com/Neargye/magic_enum. Where is the drawback? This library uses a compiler-specific hack (based on __PRETTY_FUNCTION__ / __FUNCSIG__), which works on Clang >= 5, MSVC >= 15.3 and GCC >= 9. Enum value must be in range [MAGIC_ENUM_RANGE_MIN, MAGIC_ENUM_RANGE_MAX]. By default MAGIC_ENUM_RANGE_MIN … Read more
Flags (or compiler options) are nothing but ordinary command line arguments passed to the compiler executable. Assuming you are invoking g++ from the command line (terminal): $ g++ -std=c++11 your_file.cpp -o your_program or $ g++ -std=c++0x your_file.cpp -o your_program if the above doesn’t work.
The C++ FAQ has a list of possibilities: Is it possible to convert C++ to C?. In short, it says that you can’t expect this to give you particularly readable code. Think of the complexities involved; multiple inheritance, virtual-function resolution, templates, operator overloading, etc., etc. There’s no clean succinct way of expressing these concepts in pure C. If … Read more
You are using growthRate both as a variable name and a function name. The variable hides the function, and then you are trying to use the variable as if it was the function – that is not valid. Rename the local variable.
Pointer to an integer value Pointer to a pointer to an integer value (Ie, in the second case you will require two dereferrences to access the integer’s value)
At worst, your lecturer is wrong. At best, he was simplifying terminology, and confusing you in the process. This is reasonably commonplace in software education, unfortunately. The truth is, many books get this wrong as well; the array is not “passed” at all, either “by pointer” or “by reference”. In fact, because arrays cannot be passed by … Read more