C++源代码单词扫描程序

C++源代码单词扫描程序C++源代码单词扫描程序C++源代码单词扫描程序xxx公司C++源代码单词扫描程序文件编号：文件日期：修订次数：第1.0次更改批准审核制定方案设计，管理制度院 系：计算机学院实验课程:编译原理实验实验项目：C++源代码单词扫描程序（词法分析）指导老师：黄煜廉实验项目C++源代码单词扫描程序（词法分析）实验要求C++源代码扫描程序识别C++记号。C++语言包含了几种类型的记号：标识符，关键字，数（包括整数、浮点数），字符串、注释、特殊符号（分界符）和运算符号等。打开一个C++源文件，打印出所有以上的记号。要求应用程序应为Windows界面。选作部分：为了提高C++源程序的可读性，C++程序在书写过程中加入了空行、空格、缩进、注释等。假设你想牺牲可读性，以节省磁盘空间，那么你可以存贮一个删除了所有不必要空格和注释的C++源程序的压缩文本。因此，程序中还应该有这样的压缩功能。选作部分：进一步思考或实现——如何进一步实现减小源文件大小的压缩功能。应该书写完善的软件文档。需求分析根据所需的功能程序应分为分析关键字、分析标识符、分析数字、分析串、分析注释、分析特殊字符和过滤多余字符几部分。关键字有.gotoincludeforbreakcaseifstructclass等。过滤字符要考虑到空格和换行。实验代码#include<>#include<>#include<>#include<>#include<>FILE*fp;charstring(charc[]);,"(",")","{","}","&&","||","!","()",">>"};char*keyword[35]={"","include","break","case","char","const","continue","default","do","double","else","enum","cin","float","for","goto","if","int","long","cout","return","short","signed","sizeof","static","struct","switch","typedef","printf","union","unsigned","void","volatile","while","main"};intsearch(charsearchstr[],inttype) { letter[++i]=ch; ch=fgetc(fp); } letter[i+1]='\0'; if(search(letter,1)) { cout<<letter<<""<<"关键字"<<endl; } else { cout<<letter<<""<<"标识符"<<endl; } return(ch);}charnumber(charch)//数字处理{ inti=-1; charnum[20]; while(isdigit(ch)!=0) { num[++i]=ch; ch=fgetc(fp); } if(isalpha(ch)!=0) { while(!isspace(ch)) { num[++i]=ch;ch=fgetc(fp); } num[i+1]='\0'; cout<<num<<""<<"错误！"<<endl; gotoloop; } num[i+1]='\0'; cout<<num<<""<<"数字"<<endl;loop:return(ch);}charother(charch){ inti=-1; charother[1000]; if(isspace(ch))//是空格 { ch=fgetc(fp); gotoloop; } while((!isspace(ch))&&(!isalnum(ch)))//不是空格且不是字母或数字 { other[++i]=ch; ch=fgetc(fp);//若是字母，不是空格的判断没有写出来 } other[i+1]='\0'; if(search(other,2)) cout<<other<<""<<"算数运算符"<<endl; else if(search(other,3)) cout<<other<<""<<"特殊符号"<<endl; else if(search(other,4)) cout<<other<<""<<"注释符"<<endl;loop:return(ch);}charstring(charc[])//字符串{ inti=0;//charch; charstri[100]; stri[i]=c[0]; ch=fgetc(fp); while(ch!='"') { stri[++i]=ch; ch=fgetc(fp); } stri[++i]=ch; stri[++i]='\0'; cout<<stri<<""<<"字符串"<<endl; return(ch);}intmain(){charstr,c;cout<<"Pleaseenterafilename："; charFileName[100]; cin>>FileName; fp=fopen(FileName,"r"); if(fp==NULL) { cout<<"Unabletoopenfile!"<<endl; return0; } else { cout<<"Openthefilesuccessfully!"<<endl; cout<<fp<<endl; str=fgetc(fp); while(str!=EOF) { if(isalpha(str)) str=letter(str); else { if(isdigit(str))