Cygwin Make bash command not found
You probably have not installed make. Restart the cygwin installer, search for make, select it and it should be installed. By default the cygwin installer does not install everything for what I remember.
c++
Call to non-static member function without an object argument compiler error
The error message from the compiler is very clear. getInput is a non-static member function of the class. You need an object of the class to be able to use that member function. Instead of use Another solution. Since the class does not have any member variables, you may change getInput to a static member functions. If you do that, you … Read more
Reference to non-static member function must be called
The problem is that buttonClickedEvent is a member function and you need a pointer to member in order to invoke it. Try this: And then when you invoke it, you need an object of type MyClass to do so, for example this: http://www.codeguru.com/cpp/cpp/article.php/c17401/C-Tutorial-PointertoMember-Function.htm
gcc: undefined reference to
However, avpicture_get_size is defined. No, as the header (<libavcodec/avcodec.h>) just declares it. The definition is in the library itself. So you might like to add the linker option to link libavcodec when invoking gcc: Please also note that libraries need to be specified on the command line after the files needing them: Not like this: Referring to Wyzard‘s comment, the complete command might look like … Read more
generate random double numbers in c++
Here’s how Remember to call srand() with a proper seed each time your program starts. [Edit] This answer is obsolete since C++ got it’s native non-C based random library (see Alessandro Jacopsons answer) But, this still applies to C
https://stackoverflow.com/questions/3865946/error-generic-array-creation
getline() will read one line of text. It can’t read directly an int. This is why you get your error message. You have to be aware that there are two getline(). There is one which is istream::getline() and std::getline(). Both have different signatures. The first is a member function of a stream and is defined in the stream header; the … Read more
Using C-string gives Warning: “Address of stack memory associated with local variable returned”
Variable char* matches[1]; is declared on stack, and it will be automatically released when current block goes out of the scope. This means when you return matches, memory reserved for matches will be freed, and your pointer will point to something that you don’t want to. You can solve this in many ways, and some of them are: Declare matches[1] as static: static char* … Read more
use of class template requires template argument list
It should be: And if your code is that short, just inline it, as you can’t separate the implementation and header of a template class anyway.
Very basic inheritance: error: expected class-name before ‘{’ token
I’m trying to learn c++ and I’ve stumbled upon a error while trying to figuring out inheritance. Compiling: daughter.cpp In file included from /home/jonas/kodning/testing/daughter.cpp:1: /home/jonas/kodning/testing/daughter.h:6: error: expected class-name before ‘{’ token Process terminated with status 1 (0 minutes, 0 seconds) 1 errors, 0 warnings My files: main.cpp: mother.cpp: mother.h: daughter.h: and daughter.cpp: What I want … Read more
C++ – pointer being freed was not allocated error
Welcome to the exciting world of C++! Short answer: you’re passing Store as a value. All your menu functions should take a Store& or Store* instead. When you’re passing Store as a value then an implicit copy is done (so the mainStore variable is never actually modified). When you return from the function the Store::~Store … Read more