How to call a method in class C++

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I have built a windows form application in C++ and I created a class with methods. But when accessing those methods it doesn't work.I have included header files as well as those methods are public. Please help me with this problem.

Here is the method.

C++

int Segmentation::Vertical_Projection(char *filename,int width,int height){...}

This is inside Segmentation.cpp and my class name is Segmentation.

C++

class Segmentation
{
public:
    Segmentation(void);
    ~Segmentation(void);

    IplImage* Resize(IplImage *img);
    char Horizontal_projection(int width,int height,IplImage *binary,int countPositions,int *pos);
    int Vertical_Projection(char *filename,int width,int height);
};

This is inside Segmentation.h

I was trying to access that method in another source file with including the header file.

Posted 30-May-13 9:30am

123ezone

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Sergey Alexandrovich Kryukov · Answer 1 · 2013-05-30T10:22:00

This method is an instance method, not a static method. You cannot call it like this. You should first make an instance of Segmentation^ myInstance using gcnew and then call it with this instance via myInstance->Vertical_Projection(/* ... */):

C++

Segmentation^ myInstance = gcnew Segmentation();
myInstance->Vertical_Projection(/* ... */);

Please see: http://msdn.microsoft.com/en-us/library/te3ecsc8%28v=vs.110%29.aspx[^].

Let me tell you that, unfortunately, no answers can help you to do any programming at all: at this moment, you have no clue. This is such a basic thing, that you really should start from the very beginning. Grab a book or a manual and start from the very beginning, doing the simplest possible exercises as you go. When you get some confidence, come back and ask your questions.

—SA