@Echo Off
Setlocal Enabledelayedexpansion
Title 【老刘编写】一元多项式相加算法
Path "%~dp0"
If Not Exist "Queue_LSS.Bat" (
	Echo "Queue_LSS"缺失！
	Pause&Exit
)
Set "Queue=Call Queue_LSS"

Echo 多项式格式：系数1_指数1 系数2_指数2 ...
Echo 要求：指数为整数且递减，但不必相邻。
Echo 多项式例：3_5 4_4 -1_3 2_1 -1_0
Echo 多项式例：2_4 1_3 -7_2 1_1
Set /P Polynomial_1_String=输入多项式1：
Set /P Polynomial_2_String=输入多项式2：

Rem 生成队列。
!Queue! :Init Polynomial_1
For %%a In (!Polynomial_1_String!) Do (
	Set _TMP_Data1_=%%a
	!Queue! :Enqueue Polynomial_1 _TMP_Data1_
)
!Queue! :Init Polynomial_2
For %%a In (!Polynomial_2_String!) Do (
	Set _TMP_Data2_=%%a
	!Queue! :Enqueue Polynomial_2 _TMP_Data2_
)

Rem 相加。
!Queue! :Dequeue Polynomial_1 _TMP_Data1_
!Queue! :Dequeue Polynomial_2 _TMP_Data2_
:Loop
	Rem echo !_TMP_Data1_! !_TMP_Data2_!
	For /f "Tokens=1-4 Delims=_ " %%a In ("!_TMP_Data1_! !_TMP_Data2_!") Do (
		Set /A _TMP_Coef1_=%%a,_TMP_Expon1_=%%b
		Set /A _TMP_Coef2_=%%c,_TMP_Expon2_=%%d
	)
	rem Set _TMP_Expon
	If !_TMP_Expon1_! Gtr !_TMP_Expon2_! (
		Echo !_TMP_Expon1_!次项系数：!_TMP_Coef1_!
		!Queue! :Dequeue Polynomial_1 _TMP_Data1_
		Rem echo !ErrorLevel!←
		If !Errorlevel! Neq 0 (
			Rem 队1已清空，输出队2。
			For /f "Tokens=1-2 Delims=_ " %%a In ("!_TMP_Data2_!") Do (
				Echo %%b次项系数：%%a
			)
			rem echo 2
			Call :PrintLast Polynomial_2
			Pause&Exit
		)
		rem echo 3
	) Else If !_TMP_Expon1_! Lss !_TMP_Expon2_! (
		Echo !_TMP_Expon2_!次项系数：!_TMP_Coef2_!
		!Queue! :Dequeue Polynomial_2 _TMP_Data2_
		If !Errorlevel! Neq 0 (
			Rem 队2已清空，输出队1。
			For /f "Tokens=1-2 Delims=_ " %%a In ("!_TMP_Data1_!") Do (
				Echo %%b次项系数：%%a
			)
			Call :PrintLast Polynomial_1
			Pause&Exit
		)
	) Else (
		Set /A _TMP_CoefLast=_TMP_Coef1_+_TMP_Coef2_
		Echo !_TMP_Expon1_!次项系数：^(!_TMP_Coef1_!^)+^(!_TMP_Coef2_!^)=!_TMP_CoefLast!
		!Queue! :Dequeue Polynomial_1 _TMP_Data1_
		If !Errorlevel! Neq 0 (
			Rem 队1已清空，输出队2。
			Call :PrintLast Polynomial_2
			Pause&Exit
		)
		!Queue! :Dequeue Polynomial_2 _TMP_Data2_
		If !Errorlevel! Neq 0 (
			Rem 队2已清空，输出队1。
			Rem 由于刚才队1的一个元素出队，所以在这里先输出。
			For /f "Tokens=1-2 Delims=_ " %%a In ("!_TMP_Data1_!") Do (
				Echo %%b次项系数：%%a
			)
			Call :PrintLast Polynomial_1
			Pause&Exit
		)
	)
Goto :Loop

:PrintLast
	rem echo 4
	!Queue! :Dequeue "%~1" _TMP_Data_
	If !ErrorLevel! Equ 0 (
		For /f "Tokens=1-2 Delims=_ " %%a In ("!_TMP_Data_!") Do (
				Echo %%b次项系数：%%a
		)
		Goto :PrintLast
	)
Goto :Eof
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