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武漢大學國際軟件學院編譯原理作業 C++實現計算器+ —* \ 帶括號運算 [作業內容和要求] 設計和實現一個計算器，實現整數、實數的加減乘除四則運算，要求： 1、輸入字符串（直接從控制臺輸入、或采用文件輸入），可識別的合法單詞（token） 為：整數（不以0 開頭）、實數（不以0 開頭）、‘+’、‘-’、‘*’、‘/’，‘(’、‘)’，‘=’。 以‘=’作為輸入結束符。 2、輸出要求：檢查中綴表達式表示的加減乘除運算是否符合正常的表達式規則， 如果中綴表達式合法，則輸出計算結果；如果不合法，則輸出出錯提示。

資源截圖

代碼片段和文件信息 


#include?
using?std::endl;?
using?std::cout;?
using?std::cin;?

class?Numbers???//定義存放數字的類
{	
	?private:?
?????????long?double?Num_str[200];
?????protected:?
?????????Numbers（）:count（0）{}?
?????????~Numbers（）{};?
?????????int?count;
?????????int?Num_set（long?double?num）
?????????{?
?????????????Num_str[count]=num;?
?????????????count++;?
?????????????return?0;?
?????????}?
?????????int?Num_input（long?double?numint?b）?
?????????{?
?????????????Num_str[b]=num;?
?????????????return?0;?
?????????}?
?????????long?double?getNum（int?b）
?????????{?
?????????????return?Num_str[b];?
?????????}?
?????????bool?display（）;
};?

class?sign????//定義一個符號的類
{?
?????protected:?
?????????int?a;		//‘0‘標志?
?????????int?b;		//‘1-9‘標志?
?????????int?c;		//‘+-‘標志?
?????????int?d;		//‘*‘標志?
?????????int?e;		//‘/‘標志?
?????????int?f;		//‘（‘標志?
?????????int?g;		//‘）‘標志?
?????????int?h;		//‘.‘標志?
?????????int?i;		//‘=‘標志?
?????????int?fc;	//‘（‘計數器?
?????????int?gc;	//‘）‘計數器?
????????
?????????sign（）:a（0）b（0）c（0）d（0）e（0）f（0）g（0）h（0）i（0）fc（0）gc（0）{}?
?????????~sign（）{};?
};?



class?compute:protected?Numbersprotected?sign???//定義一個計算類
{?
?????private:?
?????????char?member;
?????????compute?*next;?
?????protected:?
?????????bool?creat（compute?**head_adrint?debug_model=0）;					?????//構建算式鏈表
?????????bool?isValid（compute?*headint?debug_model=0）;						?????//判斷有效性
?????????bool?deal（compute?*headcompute?**deal_head_adrint?debug_model=0）;?????//數值有效化處理
?????????bool?comput（compute?**comput_head_adrint?debug_model=0）;??????????????//算式計算
?????????long?double?ltodf（compute?*ch_head）;									//字符串轉雙精度浮點型
?????public:?
?????????compute（）:next（NULL）{}???//構造函數?
?????????bool?main_Fun（）;?????????//總函數
?????????~compute（）{};?
};?

??



//構建算式鏈表
bool?compute::creat（compute?**head_adrint?debug_model）?
{?
?????char?get[1000];?
?????char?*point;?
?????int?i;?
?????compute?*p*cur;?
?????cout<<“請輸入四則運算式“;?
?????if（debug_model==1）?
?????????cout<<“（debug模式）“<?????else?
?????????cout<?????cin>>get;?
?????for（point=getp=NULL*head_adr=cur=NULL;*point!=‘\n‘;point++）??//依次讀取字符串中的字符?
?????{?
?????????switch（*point）?
?????????{?
?????????????case?‘.‘:?
?????????????case?‘0‘:?
?????????????case?‘1‘:?
?????????????case?‘2‘:?
?????????????case?‘3‘:?
?????????????case?‘4‘:?
?????????????case?‘5‘:?
?????????????case?‘6‘:?
?????????????case?‘7‘:?
?????????????case?‘8‘:?
?????????????case?‘9‘:?
?????????????case?‘+‘:?
?????????????case?‘-‘:?
?????????????case?‘*‘:?
?????????????case?‘/‘:?
?????????????case?‘（‘:?
?????????????case?‘）‘:p=new?compute;?
??????????????????p->member=*point;?
??????????????????if（*head_adr==NULL）?

??????????????????????*head_adr=p;?
??????????????????else?
??????????????????????cur->next=p;?
??????????????????cur=p;?
??????????????????break;?
?????????????case?‘=‘:p=new?compute;?
??????????????????p->member=*point;?
??

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

?????文件??????15261??2013-03-25?22:57??新建文件夾\Calculator\Calculator\Calculator.cpp

?????文件???????4025??2013-03-25?23:08??新建文件夾\Calculator\Calculator\Calculator.vcxproj

?????文件????????948??2013-03-25?23:08??新建文件夾\Calculator\Calculator\Calculator.vcxproj.filters

?????文件?????202452??2013-03-25?23:08??新建文件夾\Calculator\Calculator\Debug\Calculator.obj

?????文件???????1550??2013-03-25?23:08??新建文件夾\Calculator\Calculator\Debug\cl.command.1.tlog

?????文件??????22324??2013-03-25?23:08??新建文件夾\Calculator\Calculator\Debug\CL.read.1.tlog

?????文件???????1162??2013-03-25?23:08??新建文件夾\Calculator\Calculator\Debug\CL.write.1.tlog

?????文件?????????94??2013-03-25?23:08??新建文件夾\Calculator\Calculator\Debug\ConsoleApplication2.lastbuildstate

?????文件???????2002??2013-03-25?23:08??新建文件夾\Calculator\Calculator\Debug\ConsoleApplication2.log

?????文件??????????2??2013-03-25?23:08??新建文件夾\Calculator\Calculator\Debug\link-cvtres.read.1.tlog

?????文件??????????2??2013-03-25?23:08??新建文件夾\Calculator\Calculator\Debug\link-cvtres.write.1.tlog

?????文件??????????2??2013-03-25?23:08??新建文件夾\Calculator\Calculator\Debug\link-rc.read.1.tlog

?????文件??????????2??2013-03-25?23:08??新建文件夾\Calculator\Calculator\Debug\link-rc.write.1.tlog

?????文件??????????2??2013-03-25?23:08??新建文件夾\Calculator\Calculator\Debug\link.12604-cvtres.read.1.tlog

?????文件??????????2??2013-03-25?23:08??新建文件夾\Calculator\Calculator\Debug\link.12604-cvtres.write.1.tlog

?????文件??????????2??2013-03-25?23:08??新建文件夾\Calculator\Calculator\Debug\link.12604-rc.read.1.tlog

?????文件??????????2??2013-03-25?23:08??新建文件夾\Calculator\Calculator\Debug\link.12604-rc.write.1.tlog

?????文件??????????2??2013-03-25?23:08??新建文件夾\Calculator\Calculator\Debug\link.12604.read.1.tlog

?????文件??????????2??2013-03-25?23:08??新建文件夾\Calculator\Calculator\Debug\link.12604.write.1.tlog

?????文件??????????2??2013-03-25?23:08??新建文件夾\Calculator\Calculator\Debug\link.13028-cvtres.read.1.tlog

?????文件??????????2??2013-03-25?23:08??新建文件夾\Calculator\Calculator\Debug\link.13028-cvtres.write.1.tlog

?????文件??????????2??2013-03-25?23:08??新建文件夾\Calculator\Calculator\Debug\link.13028-rc.read.1.tlog

?????文件??????????2??2013-03-25?23:08??新建文件夾\Calculator\Calculator\Debug\link.13028-rc.write.1.tlog

?????文件??????????2??2013-03-25?23:08??新建文件夾\Calculator\Calculator\Debug\link.13028.read.1.tlog

?????文件??????????2??2013-03-25?23:08??新建文件夾\Calculator\Calculator\Debug\link.13028.write.1.tlog

?????文件???????1466??2013-03-25?23:08??新建文件夾\Calculator\Calculator\Debug\link.command.1.tlog

?????文件???????3060??2013-03-25?23:08??新建文件夾\Calculator\Calculator\Debug\link.read.1.tlog

?????文件????????762??2013-03-25?23:08??新建文件夾\Calculator\Calculator\Debug\link.write.1.tlog

?????文件?????338944??2013-03-25?23:08??新建文件夾\Calculator\Calculator\Debug\vc110.idb

?????文件?????348160??2013-03-25?23:08??新建文件夾\Calculator\Calculator\Debug\vc110.pdb

............此處省略14個文件信息

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