why there is compiling error about library. I already add library in Arduino

Would u help me on this?

the library I want to add is a folder "pong", as attached zip file

I copy the folder "pong" in Documents\Arduino\libraries, in Arduino , I can see there is "pong" in Sketch->import library .
why does it still have compiling error "fatal error: oled/Edison_OLED.h: No such file or directory" ?

code as below :

#include
#include "oled/Edison_OLED.h"
#include "gpio/gpio.h"
#include "math.h"
#include <unistd.h> // for usleep
#include <stdlib.h> // Gives us atoi
#include <stdio.h>

void setup() {
// put your setup code here, to run once:

}

void loop() {
// put your main code here, to run repeatedly:

}

pong_example.zip (34.7 KB)

Do you have the Edison board? Did you install the Edison support in Tools->Board->Board Manager...? Did you select the Edison board from Tools->Board? Any of those could keep the Edison-specific library from loading.

Hi John,
Yes, I already setup Edison board which can connect with Putty, can flash SW.
there is problem about library I copy to C:\Arduino\libraries, I search in forum that it says I miss keywords.txt, but I don't know how to write keywords.txt, is there any rule?

here I just add attachment which has detail steps and library I use

Arduino question1.zip (268 KB)