編譯原理語(yǔ)法生成器

1、賦值語(yǔ)句的解釋程序設(shè)計(jì)1.1.11.21.32.單詞種別碼：優(yōu)先關(guān)系表:3.na源碼：#include#include#defineN100usingnamespacestd;/*ODO*/structMapstringvalue;intcode;）；/*全局變量*/stringmainStr=”;/intmainPla=0;/00000000MapcodeMapN;/DDOMapstrMapN;/00000DD0intstrMP=0;/DDDDDDDDDDMapOStackN;/DOOMapCStackN;/字母數(shù)字chargxExcelNN;/關(guān)系數(shù)組intnumGx=13;/行列指示/*

2、文件操作*/voidsetGxExcel()fstreamf(D:gxExcel.txt);for(inti=1;inumGx;i+)for(intj=1;jgxExcelij;f.close();voidsetCodeMap()inti;fstreamf(D:codeMap.txt);for(i=0;!f.eof();i+)fcodeMapi.valuecodeMapi.code;codeMapi.code=-1;f.close();voidsetMainStr()stringts;fstreamf(D:mainStr.txt);while(!f.eof()fts;ts.append(#);

3、mainStr.append(ts);f.close();voidoutStrMap()fstreamf(D:strMap.txt);for(inti=0;istrMP;i+)fstrMapi.valuestrMapi.code47&mainStrmainPla+147&ch47&mainStrmainPla64&ch96&ch64&mainStrmainPla96&mainStrmainPla123)chsi+=mainStrmainPla+;chsi=0;ts.append(chs);if(ts=v)addStrMap(ts,-1);elseif(ts=c)addStrMap(ts,-1)

4、;elseif(ts=clear)addStrMap(ts,-1);elseif(ts=N)addStrMap(ts,-1);elseaddStrMap(ts,21);return;chs0=ch;chs1=0;ts.append(chs);if(addStrMap(ts,-1)mainPla+;elsemainPla+;voidparseStr()/解析字符串while(mainStrmainPla)parseLetter(mainStrmainPla);/*/boolconStr()OStack0.value=#;OStack0.code=12;for(ints=0,i1=1,i2=0;s

5、strMP;s+)coutS:s0&strMaps.code14)if(gxExcelstrMaps.codeOStacki1-1.code=)if(OStacki1-1.value=?)i1-;CStacki2-1.value=N;CStacki2-1.code=13;elseif(OStacki1-1.value=+|OStacki1-1.value=-|OStacki1-1.value=*|OStacki1-1.value=/|OStacki1-1.value=)i1-=1;CStacki2-2.value=N;CStacki2-2.code=13;i2-=1;elseif(OStack

6、i1-1.value=clear)i1-=1;CStacki2.value=N;CStacki2.code=11;i2+;elseif(OStacki1-1.value=c)i1-=1;CStacki2.value=N;CStacki2.code=10;i2+;elseif(OStacki1-1.value=v)i1-=1;CStacki2.value=N;CStacki2.code=9;i2+;s-;elseif(gxExcelstrMaps.codeOStacki1-1.code=)if(OStacki1-1.value=)&OStacki1-2.value=()i1-=2;CStacki2-1.value=N;CStacki2-1.code=13;elseif(OStacki1-1.value=#&strMaps.value=#)if(i2!=1)returnfalse;elsei2=0;i1=1;elseOStacki1.value=strMaps.value;OStacki1+.code=strMaps.code;elseCStacki2.value=strMaps.value;CStacki2+.code=strMaps.code;returntrue;/*/intmain()setGxExcel