#define?_CRT_SECURE_NO_WARNINGS
#include?
#include?
extern?“C“?{
	#include?“./jpeg_lib/jpeglib.h“
}
#pragma?comment（lib“./jpeg_lib/libjpeg.lib“）

/*
**?壓縮?BMP?圖片為?JPG?圖片
**?如果要進(jìn)行對(duì)?JPG?圖片的清晰度的調(diào)整，調(diào)宏?JPEG_QUALITY?的值即可，越大越清晰
*/
#define?JPEG_QUALITY?80	//?根據(jù)這個(gè)值，來調(diào)整.jpg畫質(zhì)的清晰度
int?CompressBMPtoJPG（char?*filename?unsigned?char?*bits?int?width?int?height?int?depth）
{
	struct?jpeg_compress_struct?cinfo;
	struct?jpeg_error_mgr?jerr;
	FILE?*?outfile;?????????????????//target?file???
	JSAMPROW?row_pointer[1];????????//pointer?to?JSAMPLE?row[s]???
	int?????row_stride;?????????????//physical?row?width?in?image?buffer???
	cinfo.err?=?jpeg_std_error（&jerr）;
	jpeg_create_compress（&cinfo）;

	if?（（outfile?=?fopen（filename?“wb“））?==?NULL）
	{
		fprintf（stderr?

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2018-01-14?21:22??截圖并將BMP壓縮為JPG\
?????目錄???????????0??2018-01-14?21:00??截圖并將BMP壓縮為JPG\Debug\
?????文件??????250880??2018-01-14?20:45??截圖并將BMP壓縮為JPG\Debug\截圖并壓縮（libjpeg庫）.exe
?????目錄???????????0??2018-01-14?20:55??截圖并將BMP壓縮為JPG\截圖并壓縮\
?????文件????????1327??2018-01-14?18:17??截圖并將BMP壓縮為JPG\截圖并壓縮.sln
?????目錄???????????0??2018-01-14?18:16??截圖并將BMP壓縮為JPG\截圖并壓縮\jpeg_lib\
?????文件????????1605??2015-07-29?19:44??截圖并將BMP壓縮為JPG\截圖并壓縮\jpeg_lib\jconfig.h
?????文件???????15371??2013-09-17?17:20??截圖并將BMP壓縮為JPG\截圖并壓縮\jpeg_lib\jmorecfg.h
?????文件???????50467??2015-09-15?03:36??截圖并將BMP壓縮為JPG\截圖并壓縮\jpeg_lib\jpeglib.h
?????文件?????4448182??2018-01-13?11:10??截圖并將BMP壓縮為JPG\截圖并壓縮\jpeg_lib\libjpeg.lib
?????文件????????9848??2018-01-14?20:34??截圖并將BMP壓縮為JPG\截圖并壓縮\main.cpp
?????文件????????7313??2018-01-14?20:45??截圖并將BMP壓縮為JPG\截圖并壓縮\截圖并壓縮.vcxproj
?????文件?????????945??2018-01-13?15:11??截圖并將BMP壓縮為JPG\截圖并壓縮\截圖并壓縮.vcxproj.filters