w.program.h not found in libarary

Using Arduino Storage
1

Arduino: 1.8.5 (Windows 8.1), Board: "Arduino/Genuino Uno"

In file included from C:\Users\STEADF~1\AppData\Local\Temp\arduino_modified_sketch_569081\sketch_jun08c.ino:3:0:

C:\Program Files (x86)\Arduino\libraries\JPEGCamera/JPEGCamera.h:10:22: fatal error: WProgram.h: No such file or directory

#include "WProgram.h"

^

compilation terminated.

exit status 1
Error compiling for board Arduino/Genuino Uno.

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

2

WProgram means Wiring Program

Wiring is IDE that M Banzi forks to create Arduino.
Wiring was released in 2004 and Arduino in 2005.

With Arduino you must use :
#include "Arduino.h"

3

To my knowledge, it actually depends on the IDE. I know that any version above 1.6.6 needs to use Arduino.h, not familiar with earlier versions so not sure where the change happened.

4

sterretje:
not sure where the change happened.

It started being Arduino.h way back at 1.0 IIRC.

5

Wiring released the first his version 1.0. He renamed the WProgram.h file to Wiring.h
Arduino was surprised and a month later arduino urgently released his version 1.0 where he renamed the file WProgram.h to Arduino.h

As Arduino 1.0 was released in a hurry, arduino 1.0 was followed very quickly by 1.0.1, 1.0.2, 1.0.3, 1.0.4.
The first stable version was 1.0.5 followed by 1.0.6 which finally brought the display of line numbers.