GPT答：

7i24.cn

The error message is indicating that you are trying to access a non-static data member `transtream` from the class `grabImage` in a static context. 

To fix this error, you have two options:

1. Make the `transtream` member variable static:
   - In your `grabImage.h` file, change the declaration of `transtream` to: 
     ```cpp
     static bool transtream;
     ```
   - In your `grabImage.cpp` file, add the definition of `transtream`, outside of any function:
     ```cpp
     bool grabImage::transtream = false;
     ```

2. Create an instance of the class and access its member variable through that instance:
   - In your main function, create an instance of the `grabImage` class:
     ```cpp
     grabImage image;
     ```
   - Change your if statement to use the instance's member variable instead:
      ```cpp
      if (image.transtream == false) {
      ```

Choose one option based on how you intend to use the `transtream` variable in your program.