glfw joystick access

GLFW Joystick read

vector<string> joys;
for(int j = 0; j < 5; j++){
	bool joyOK = glfwJoystickPresent(j);
	if(joyOK){
		int n;
		const float *data = glfwGetJoystickAxes(j, &n);
		string thisj = string(glfwGetJoystickName(j)) + "\n  axes\n";

		//axes
		for(int i = 0; i < n; i++){
			thisj += "    a" + ofToString(i) + ": " + ofToString(data[i], 2) + "\n";
		}
		thisj += "\n  buttons\n";

		//buttons
		int nBut;
		const unsigned char * bData = glfwGetJoystickButtons(j, &nBut);
		for(int i = 0; i < nBut; i++){
			thisj += "    b" + ofToString(i) + ": " + ofToString((int)bData[i]) + "\n";
		}

		joys.push_back(thisj);
	}
	for(int i = 0; i < joys.size(); i++){
		ofDrawBitmapString(joys[i], 100 + 130 * i, 100  );
	}
}