#include?
#include?
using?namespace?std;

#pragma?pack（2）????????//兩字節(jié)對(duì)齊，否則bmp_fileheader會(huì)占16Byte
struct?bmp_fileheader
{
	unsigned?short????bfType;????????//若不對(duì)齊，這個(gè)會(huì)占4Byte
	unsigned?long????bfSize;
	unsigned?short????bfReverved1;
	unsigned?short????bfReverved2;
	unsigned?long????bfOffBits;
};

struct?bmp_infoheader
{
	unsigned?long????biSize;
	unsigned?long????biWidth;
	unsigned?long????biHeight;
	unsigned?short????biPlanes;
	unsigned?short????biBitCount;
	unsigned?long????biCompression;
	unsigned?long????biSizeImage;
	unsigned?long????biXPelsPerMeter;
	unsigned?long????biYpelsPerMeter;
	unsigned?long????biClrUsed;
	unsigned?long????biClrImportant;
};

fstream?input_file;
fstream?output_file;

struct?bmp_fileheader?bfh;
struct?bmp_infoheader?bih;

unsigned?char?*src_buff;
unsigned?char?*dst_buff;

void?read_bmp_fileheader（）
{

	input_file.read（（char*）&bfh?sizeof（struct?bmp_fileheader））;

	cout?<
}

void?read_bmp_infoheader（）
{

	input_file.read（（char*）&bih?sizeof（struct?bmp_infoheader））;

}

void?read_bmp_data（）
{
	src_buff?=?new?unsigned?char[bih.biHeight*bih.biWidth?*?3];

	input_file.read（（char*）src_buff?sizeof（unsigned?char）*bih.biHeight*bih.biWidth?*?3）;

}

void?bmp_rgb2gray（）
{
	dst_buff?=?new?unsigned?char[bih.biHeight*bih.biWidth];
	int?tmp;
	unsigned?long?j?=?0;
	for?（unsigned?long?i?=?0;?i	{
		tmp?=?（src_buff[i]?+?src_buff[i?+?1]?+?src_buff[i?+?2]）?/?3;
		dst_buff[j++]?=?（unsigned?char）tmp;
	}
}

void?write_bmp_fileheader（）
{

	bfh.bfSize?=?bfh.bfOffBits?+?256?*?4?+?bih.biWidth*bih.biHeight;????????//256*4是調(diào)色板占的字節(jié)數(shù)
	bfh.bfOffBits?=?bfh.bfOffBits?+?256?*?4;

	output_file.write（（char*）&bfh?sizeof（struct?bmp_fileheader））;

}

void?write_bmp_infoheader（）
{
	bih.biBitCount?=?8;????????????//8位灰度圖

	output_file.write（（char*）&bih?sizeof（struct?bmp_infoheader））;
}

void?write_bmp_paltte（）????????//灰度圖像需要調(diào)色板
{
	unsigned?char?j?=?0;
	unsigned?char?z?=?0;
	for?（int?i?=?0;?i<1024;?i?+=?4）
	{
		output_file.write（（char*）&j?sizeof（unsigned?char））;
		output_file.write（（char*）&j?sizeof（unsigned?char））;
		output_file.write（（char*）&j?sizeof（unsigned?char））;

		output_file.write（（char*）&z?sizeof（unsigned?char））;
		j++;
	}
}

void?write_bmp_data（）
{

	output_file.write（（char*）dst_buff?sizeof（unsigned?char）*bih.biWidth*bih.biHeight）;

}

int?main（）
{
	input_file.open（“test.bmp“?ios::binary?|?ios::in）;
	output_file.open（“test_gray.bmp“?ios::binary?|?ios::out）;

	read_bmp_fileheader（）;
	read_bmp_infoheader（）;
	read_bmp_data（）;

	bmp_rgb2gray（）;

	write_bmp_fileheader（）;
	write_bmp_infoheader（）;
	write_bmp_paltte（）;
	write_bmp_data（）;

	input_file.close（）;
	output_file.close（）;

	cout?<	cin.get（）;

	delete[]?src_buff;
	delete[]?dst_buff;
	return?0;
}

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----

????..A..H.?????35840??2018-03-05?18:22??bmpTools\.vs\bmpTools\v14\.suo

?????文件???????7378??2018-03-05?14:14??bmpTools\bmpTools\bmpTools.vcxproj

?????文件????????948??2018-03-05?14:14??bmpTools\bmpTools\bmpTools.vcxproj.filters

?????文件????????192??2018-03-05?14:23??bmpTools\bmpTools\Debug\bmpTools.log

?????文件????????207??2018-03-05?14:23??bmpTools\bmpTools\Debug\bmpTools.tlog\bmpTools.lastbuildstate

?????文件????????678??2018-03-05?14:23??bmpTools\bmpTools\Debug\bmpTools.tlog\CL.command.1.tlog

?????文件??????15884??2018-03-05?14:23??bmpTools\bmpTools\Debug\bmpTools.tlog\CL.read.1.tlog

?????文件????????524??2018-03-05?14:23??bmpTools\bmpTools\Debug\bmpTools.tlog\CL.write.1.tlog

?????文件???????1194??2018-03-05?14:23??bmpTools\bmpTools\Debug\bmpTools.tlog\link.command.1.tlog

?????文件???????2890??2018-03-05?14:23??bmpTools\bmpTools\Debug\bmpTools.tlog\link.read.1.tlog

?????文件????????502??2018-03-05?14:23??bmpTools\bmpTools\Debug\bmpTools.tlog\link.write.1.tlog

?????文件?????255055??2018-03-05?14:23??bmpTools\bmpTools\Debug\main.obj

?????文件?????338944??2018-03-05?14:23??bmpTools\bmpTools\Debug\vc140.idb

?????文件?????364544??2018-03-05?14:23??bmpTools\bmpTools\Debug\vc140.pdb

?????文件???????3023??2018-03-05?14:23??bmpTools\bmpTools\main.cpp

?????文件???????1306??2018-03-05?11:32??bmpTools\bmpTools.sln

?????文件????8364032??2018-03-05?18:22??bmpTools\bmpTools.VC.db

?????文件?????104960??2018-03-05?14:23??bmpTools\Debug\bmpTools.exe

?????文件?????754900??2018-03-05?14:23??bmpTools\Debug\bmpTools.ilk

?????文件????1265664??2018-03-05?14:23??bmpTools\Debug\bmpTools.pdb

?????目錄??????????0??2018-03-06?10:52??bmpTools\.vs\bmpTools\v14

?????目錄??????????0??2018-03-06?10:52??bmpTools\bmpTools\Debug\bmpTools.tlog

?????目錄??????????0??2018-03-06?10:52??bmpTools\.vs\bmpTools

?????目錄??????????0??2018-03-06?10:52??bmpTools\bmpTools\Debug

????...D.H.?????????0??2018-03-06?10:52??bmpTools\.vs

?????目錄??????????0??2018-03-06?10:52??bmpTools\bmpTools

?????目錄??????????0??2018-03-06?10:52??bmpTools\Debug

?????目錄??????????0??2018-03-06?10:52??bmpTools

-----------?---------??----------?-----??----

?????????????11518665????????????????????28

............此處省略1個(gè)文件信息