Reading GPIO value using ofstream

[vysero]

I would like to know if it is possible to read a GPIO value using ofstream. Or maybe I wouldn't have to use ofstream? I know how to set a GPIO value:

const char *const amplifierGPIO = "/sys/class/gpio/gpio107/value";

 void amplifierMute()
    {
      std::ofstream amp(amplifierGPIO);
      if (amp.is_open())
      {
        amp << "0";
        amp.close();
      }
    }

However, what if I want to read the GPIO's value and say use it as the argument to an if statement or more simply, just print it.

[Ganado]

If you want to read a file, use std::ifstream amp(amplifierGPIO);

{
    std::ifstream amp(amplifierGPIO);
    if (amp.is_open())
    {
        int data; // or perhaps a string?
        amp >> data;
        // use data
    }
}
// C++ streams close automatically when destroyed 

[vysero]

@Ganado Ah I see, awesome thank you!