#include?
#include?
//46?72?6F?6D?3A
int?prologue?[]?=?{
	0x5920453A?0x54756F0A?0x6F6F470A?0x21643A6F
	0x6E617920?0x680A6474?0x6F697661?0x20646E69
	0x63636363?0x63636363?0x72464663?0x6F6D6F72
	0x63636363?0x63636363?0x72464663?0x6F6D6F72
	0x2C336573?0x7420346E?0x20216F74?0x726F5966
	0x7565636F?0x20206120?0x6C616763?0x74206C6F
	0x20206F74?0x74786565?0x65617276?0x32727463
	0x594E2020?0x206F776F?0x79727574?0x4563200A
};

int?data?[]?=?{
	0x63636363?0x63636363?0x72464663?0x6F6D6F72
??????	0x466D203A?0x65693A72?0x43646E20?0x6F54540A
??????	0x5920453A?0x54756F0A?0x6F6F470A?0x21643A6F
??????	0x594E2020?0x206F776F?0x79727574?0x4563200A
??????	0x6F786F68?0x6E696373?0x6C206765?0x796C656B
??????	0x2C336573?0x7420346E?0x20216F74?0x726F5966
??????	0x7565636F?0x20206120?0x6C616763?0x74206C6F
??????	0x20206F74?0x74786565?0x65617276?0x32727463
??????	0x6E617920?0x680A6474?0x6F697661?0x20646E69
??????	0x21687467?0x63002065?0x6C6C7861?0x78742078
??????	0x6578206F?0x72747878?0x78636178?0x00783174
};

int?epilogue?[]?=?{
	0x594E2020?0x206F776F?0x79727574?0x4563200A
	0x6E617920?0x680A6474?0x6F697661?0x20646E69
	0x7565636F?0x20206120?0x6C616763?0x74206C6F
	0x2C336573?0x7420346E?0x20216F74?0x726F5966
	0x20206F74?0x74786565?0x65617276?0x32727463
};

char?message[100];

void?usage_and_exit（char?*?program_name）?{
	fprintf（stderr?“USAGE:?%s?key1?key2?key3?key4\n“?program_name）;
	exit（1）;
}

void?process_keys12?（int?*?key1?int?*?key2）?{
	
	*（（int?*）?（key1?+?*key1））?=?*key2;
}

void?process_keys34?（int?*?key3?int?*?key4）?{

	*（（（int?*）&key3）?+?*key3）?+=?*key4;
}

char?*?extract_message1（int?start?int?stride）?{
	int?i?j?k;
	int?done?=?0;

	for?（i?=?0?j?=?start?+?1;?!?done;?j++）?{
		for?（k?=?1;?k?
			if?（*（（（char?*）?data）?+?j）?==?‘\0‘）?{
				done?=?1;
				break;
			}
							?
			message[i]?=?*（（（char?*）?data）?+?j）;
		}
	}
	message[i]?=?‘\0‘;
	return?message;
}


char?*?extract_message2（int?start?int?stride）?{
	int?i?j;

	for?（i?=?0?j?=?start;?
		?*（（（char?*）?data）?+?j）?!=?‘\0‘;
		?i++?j?+=?stride）?
		?{
			?message[i]?=?*（（（char?*）?data）?+?j）;
		?}
	message[i]?=?‘\0‘;
	return?message;
}

int?main?（int?argc?char?*argv[]）
{
	int?dummy?=?1;
	int?start?stride;
	int?key1?key2?key3?key4;
	char?*?msg1?*?msg2;

	key3?=?key4?=?0;
	if?（argc?		usage_and_exit（argv[0]）;
	}
	key1?=?strtol（argv[1]?NULL?0）;
	key2?=?strtol（argv[2]?NULL?0）;
	if?（argc?>?3）?key3?=?strtol（argv[3]?NULL?0）;
	if?（argc?>?4）?key4?=?strtol（argv[4]?NULL?0）;

	process_keys12（&key1?&key2）;

	start?=?（int）（*（（（char?*）?&dummy）））;
	stride?=?（int）（*（（（char?*）?&dummy）?+?1））;

	if?（key3?!=?0?&&?key4?!=?0）?{
		process_keys34（&key3?&key4）;
	}

	msg1?=?extract_message1（start?stride）;

	if?（*msg1?==?‘\0‘）?{
		process_keys34（&key3?&key4）;
		msg2?=?e

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件?????119296??2010-12-05?22:20??SSD6Exercise答案\exec1\asc.doc

?????文件??????31744??2010-12-05?22:20??SSD6Exercise答案\exec1\exec1.doc

?????文件?????496128??2010-12-05?22:20??SSD6Exercise答案\exec1\exec1_an.doc

?????文件?????????94??2010-12-05?22:20??SSD6Exercise答案\exec1\key.txt

?????文件???????3117??2010-12-05?22:20??SSD6Exercise答案\exec1\secret.cpp

?????文件???????3401??2010-12-05?22:20??SSD6Exercise答案\exec1\secret.dsp

?????文件????????537??2010-12-05?22:20??SSD6Exercise答案\exec1\secret.dsw

?????文件??????50176??2010-12-05?22:20??SSD6Exercise答案\exec1\secret.ncb

?????文件??????49664??2010-12-05?22:20??SSD6Exercise答案\exec1\secret.opt

?????文件???????1128??2010-12-05?22:20??SSD6Exercise答案\exec1\secret.plg

?????文件????????162??2010-12-05?22:20??SSD6Exercise答案\exec1\~$asc.doc

?????文件?????128512??2010-12-05?22:20??SSD6Exercise答案\exec1\~WRL0004.tmp

?????文件???????4849??2010-12-05?22:20??SSD6Exercise答案\exec2\bits.c

?????文件????????499??2010-12-05?22:20??SSD6Exercise答案\exec2\bits.h

?????文件???????9254??2010-12-05?22:20??SSD6Exercise答案\exec2\btest.c

?????文件????????771??2010-12-05?22:20??SSD6Exercise答案\exec2\btest.h

?????文件???????1536??2010-12-05?22:20??SSD6Exercise答案\exec2\decl.c

?????文件??????21822??2010-12-05?22:20??SSD6Exercise答案\exec2\dlab-handout.zip

?????文件???????4964??2010-12-05?22:20??SSD6Exercise答案\exec2\dlab-solution\bits-solve.c

?????文件???????4968??2010-12-05?22:20??SSD6Exercise答案\exec2\dlab-solution\bits.c

?????文件????????499??2010-12-05?22:20??SSD6Exercise答案\exec2\dlab-solution\bits.h

?????文件???????9254??2010-12-05?22:20??SSD6Exercise答案\exec2\dlab-solution\btest.c

?????文件?????188489??2010-12-05?22:20??SSD6Exercise答案\exec2\dlab-solution\btest.exe

?????文件????????771??2010-12-05?22:20??SSD6Exercise答案\exec2\dlab-solution\btest.h

?????文件?????206332??2010-12-05?22:20??SSD6Exercise答案\exec2\dlab-solution\btest.ilk

?????文件????????622??2010-12-05?22:20??SSD6Exercise答案\exec2\dlab-solution\config.pm

?????文件???????1536??2010-12-05?22:20??SSD6Exercise答案\exec2\dlab-solution\decl.c

?????文件???????3893??2010-12-05?22:20??SSD6Exercise答案\exec2\dlab-solution\dlab.dsp

?????文件????????531??2010-12-05?22:20??SSD6Exercise答案\exec2\dlab-solution\dlab.dsw

?????文件??????82944??2010-12-05?22:20??SSD6Exercise答案\exec2\dlab-solution\dlab.ncb

............此處省略391個文件信息