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
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
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
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 [Edit] This answer is obsolete since C++ got it’s native non-C based random library (see Alessandro Jacopsons answer) But, this still applies to C
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
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
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.
Assuming that earlier code has already split up the line into individual numbers, then the check you want is strtol will never set endtoken to a null pointer; it will set it to point to the first character that is not a digit. If that character is the NUL string terminator (note the slightly different … Read more
Anyone know how to convert a char array to a single int?
1) Make a vector from your orig point to the point of interest: v = point-orig (in each dimension); 2) Take the dot product of that vector with the unit normal vector n: dist = vx*nx + vy*ny + vz*nz; dist = scalar distance from point to plane along the normal 3) Multiply the unit … Read more