1、賦值語(yǔ)句的解釋程序設(shè)計(jì).課程設(shè)計(jì)任務(wù)課程設(shè)計(jì)題目賦值語(yǔ)句的解釋程序設(shè)計(jì)設(shè)計(jì)要求用算符優(yōu)先方法設(shè)計(jì)一個(gè)分析解釋程序，對(duì)輸入的賦值語(yǔ)句、輸出語(yǔ)句、消除語(yǔ)句進(jìn)行詞法分析、語(yǔ)法分析、表達(dá)式求值并存儲(chǔ)于指定變量中； 若存在錯(cuò) 誤，提示錯(cuò)誤相關(guān)信息。設(shè)計(jì)目的了解掌握算符優(yōu)先分析的基本方法、內(nèi)容；學(xué)會(huì)科學(xué)思考并解決問(wèn)題，提高程 序設(shè)計(jì)能力。.設(shè)計(jì)總體方案 單詞種別碼：優(yōu)先關(guān)系表:=?+-*/()vcclear#=nnn?nnnnnnnnnnn+n-n*n/nnnnn(:nn=)nnnnnv=nnnncnnnnnclearnnnnnnnnnnn#=.代碼源碼：#include #include #define

2、 N 100 using namespace std;/* 結(jié)構(gòu)體*/struct Mapstring value;int code;/* 全局變量string mainStr = ;/ int mainPla = 0;/Map codeMapN;/ Map strMapN;/ int strMP = 0;/ Map OStackN;/*/源程序字符串源程序字符串指示編碼表解析源程序編碼表解析源程序編碼表指示 運(yùn)算符Map CStackN;/字母數(shù)字char gxExcelNN;/關(guān)系數(shù)組int numGx = 13;/行列指示/* 文件操作*/void setGxExcel()fstream

3、 f(D:gxExcel.txt);for(int i=1;inumGx;i+)for(int j=1;jgxExcelij;f.close();void setCodeMap()int i; fstream f(D:codeMap.txt);for(i=0;!f.eof();i+)fcodeMapi.valuecodeMapi.code;codeMapi.code = -1;f.close();void setMainStr()string ts; fstream f(D:mainStr.txt);while(!f.eof()fts; ts.append(# );mainStr.append

4、(ts);f.close();void outStrMap()fstream f(D:strMap.txt);for(int i=0;istrMP;i+)fstrMapi.value strMapi.code47 & mainStrmainPla+147 & ch47 &mainStrmainPla64 & ch96 & ch64 &mainStrmainPla96 & mainStrmainPla123) chsi+ = mainStrmainPla+;)chsi=0; ts.append(chs);if(ts = v) addStrMap(ts,-1);else if(ts = c) ad

5、dStrMap(ts,-1);else if(ts = clear) addStrMap(ts,-1);else if(ts = N) addStrMap(ts,-1);else addStrMap(ts,21); return;)chs0=ch; chs1=0; ts.append(chs);if(addStrMap(ts,-1) mainPla+;else mainPla+;)void parseStr()/解析字符串while(mainStrmainPla)parseLetter(mainStrmainPla);)/* 語(yǔ)法分析*/bool conStr()OStack0.value=#

6、; OStack0.code=12;for(int s=0,i1=1,i2=0;sstrMP;s+)coutS: s0 & strMaps.code14)if(gxExcelstrMaps.codeOStacki1-1.code = )if(OStacki1-1.value = ?)i1-; CStacki2-1.value = N;CStacki2-1.code=13;)else if(OStacki1-1.value = + |OStacki1-1.value = - |OStacki1-1.value = * |OStacki1-1.value = / |OStacki1-1.value

7、 = =)i1-=1; CStacki2-2.value = N;CStacki2-2.code=13; i2-=1;)else if(OStacki1-1.value = clear)i1-=1; CStacki2.value = N;CStacki2.code=11; i2+;)else if(OStacki1-1.value = c )i1-=1; CStacki2.value = N;CStacki2.code=10; i2+;)else if(OStacki1-1.value = v )i1-=1; CStacki2.value = N;CStacki2.code=9; i2+; s

8、-;else if(gxExcelstrMaps.codeOStacki1-1.code = =) if(OStacki1-1.value =)& OStacki1-2.value = ()i1-=2; CStacki2-1.value = N;CStacki2-1.code=13;else if(OStacki1-1.value = #& strMaps.value = #)if(i2!=1) return false; else i2=0;i1=1;)elseOStacki1.value = strMaps.value;OStacki1+.code= strMaps.code;elseCStacki2.value = strMaps.value;CStacki2+.code= strMaps.code;return true;/* 主函數(shù)*/