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/*识别 分界符，运算符，赋值运算符，增减运算符，逻辑与逻辑或，关系运算符，科学计数法，实型常数，整形常数，有符号数，字符串常量，关键字，标示符，输入输出流符号*/#include#include#include #includeusing namespace std;string keyword15=int,include,using,namespace,return,void,char,float,double,unsigned,string,break,continue,do,while;/*关键字标示符*/string instruction3=/,/*,*/;/*注释行符号*/分界符 char boundary9=,;,(,),#;/运算符char operation5=+,-,*,/,%;/赋值运算符char equals=; /增减运算符 string in_decrease2=+,-; /逻辑与逻辑或/string and_or2=&,|;/关系运算符 /string relation6=,=,=,=,!=;int i_point=1;/void analy_boundary(char A);void analy_operation(char A);void analy_string(char answer);void analy_keyword(char answer);void enter_p(int i_pt);void analy(FILE *fp);/void main()/主函数FILE *fp0;fp0=fopen(f:/program.txt,r+);if(fp0=NULL)printf(打开文件错误！n); exit(0);analy(fp0);return;/void analy_boundary(char A)/分析分界符的函数if(A!=EOF)if(A=,|A=;|A=|A=|A=|A=|A=(|A=)|A=#)for(int b=0;b9;b+)/char boundary11=,;,(,),#;if(A=boundaryb)cout【 分界符 A】endl; break;/void analy_operation(char A)/分析运算符的函数int d=0;if(A!=EOF)if(A=+|A=-|A=*|A=/|A=%)/char operation5=+,-,*,/,%while(d5)/char operation5=+,-,*,/,%;if(A=operationd)cout【 运算符 A】endl; break;d+;/void analy_string(char answer)/识别字符串常量cout【 符号串常量 answer】endl;/void analy_keyword(char answer)/识别关键字和标示符for(int l=0;l15;l+)if(answer=keywordl)cout【 关键字 answer】endl;break; for(int m=0;m15;m+)if(answer!=keywordl)cout【 标示符 answer】endl;break;/void enter_p(int i_pt)/分屏显示操作if(i_pt % 21 = 0) cout,=,=,=,!=;char answer_2100;/识别注释行char ch,ch0,ch1,ch2,ch3,ch4,ch5,ch6;int k=0,k1=0,k2=0,k3=0,k4=0,k5=0,k6=0;ch=fgetc(fp);/fgetc()读字符函数,如果遇到文件结束符号，函数返回文件结束标志EOFwhile(ch!=EOF)if(ch=|ch=!)/关系运算符couti_point+ : ;ch3=ch;ch=fgetc(fp); if(ch=)/判断 = , = ,!= 符号ch4=ch; cout【 关系运算符 ch3ch4】endl;ch3=ch4=0;ch=fgetc(fp);enter_p(i_point);continue;else if(ch=ch3)cout【 输入输出流符 ch3ch】 , 符号cout【 关系运算符 ch3】endl;ch3=ch4=0; enter_p(i_point);continue;if(ch=)/判断 = 和 = 符号couti_point+ : ;ch5=ch;ch=fgetc(fp);if(ch=ch5)cout【 关系运算符 ch5ch】endl;ch5=0;ch=fgetc(fp);enter_p(i_point);continue;elsecout【 赋值运算符 ch5】endl;ch5=0;enter_p(i_point);continue;if(ch=,|ch=;|ch=|ch=|ch=|ch=|ch=(|ch=)|ch=#)/判断分界符couti_point+ : ;analy_boundary(ch);enter_p(i_point); if(ch=*|ch=/|ch=%)/ ch=+|ch=-|/判断算术运算符ch6=ch;ch=fgetc(fp);if(ch6=/)if(ch=/)/判断 / 注释couti_point+ : ;answer_2k5+=ch6;answer_2k5+=ch;ch=fgetc(fp);while(ch!=n)answer_2k5+=ch;ch=fgetc(fp);answer_2k5=0;cout【 注释语句 , answer_2】endl;k5=0;ch6=0;enter_p(i_point);continue;else if(ch=*)/判断 /*.*/ 注释couti_point+ : ;answer_2k5+=ch6;answer_2k5+=ch;ch=fgetc(fp);while(ch!=/)answer_2k5+=ch;ch=fgetc(fp);answer_2k5+=ch;answer_2k5=0; cout【 注释语句 , answer_2】endl;k5=0;ch6=0;enter_p(i_point);continue; elsecouti_point+ : ; analy_operation(ch6); enter_p(i_point);ch6=0;continue;if(ch=+|ch=-)/判断算术运算符或增减运算符couti_point+=0&ch=0&ch=9|ch=.|ch=-|ch=e|ch= );numberk6=0;cout【 有符号数 ch0number】endl;enter_p(i_point);ch0=0;k6=0;continue;elseanaly_operation(ch0);ch0=0;k6=0;enter_p(i_point);continue;elsecout【 增减运算符 ch0ch】endl;ch0=0; ch=fgetc(fp);enter_p(i_point);continue;if(ch=&|ch=|)/判断逻辑与逻辑或couti_point+ : ; ch1=ch;ch=fgetc(fp);ch2=ch;cout【 逻辑与逻辑或 ch1ch2】=0&ch=9)numberk+=ch;ch=fgetc(fp);numberk=0;k=0;cout【 实型常数 number】=0&ch=9)/|ch=./判断整形常数和实型常数couti_point+=0&ch=0&ch=9)numberk+=ch;ch=fgetc(fp);numberk=0;k=0;cout【 实型常数 number】=0& ch=9|ch=e|ch=E|ch=-|ch= );numberk=0;k=0;cout【 科学计数法 number】endl;enter_p(i_point);continue;else/整型常数/整型常数numberk=0; k=0; cout【 整形常数 number】endl;enter_p(i_point); continue;if(ch=)/识别字符串couti_point+=a&ch=A&ch=Z)|ch=_)/判断关键字和标示符couti_point+=a&ch=A&ch=0&ch,=,=,=,!=,&,|,!,|,&,=,+=,-=,*=,/=,%=,=,.,(,),:,#,;,;char ch;int i,k;char buff20;char buff11;void output(int ,char*);void zhuyao(FILE *fp)int j;ch=fgetc(fp);while(ch= |ch=n|ch=t)ch=fgetc(fp);if(ch=a&ch=A&ch=a&ch=A&ch=0&ch=9)buffi=ch;i+;ch=fgetc(fp); /从流中读取字符 buffi=0; /*查找保留字*/fseek(fp,-1,1);j=0;while(j=keyword)output(2,buff);elseoutput(1,buff);else if(ch=0&ch=0&ch=0&ch=0&ch0) /*分隔符号*/buff0=ch; ch=fgetc(fp); buff1=0; fseek(fp,-1,1); k=0; if(k0) /*运算符号*/buff0=ch;ch=fgetc(fp); if(buff0=/&ch=*)while(ch!=/)ch=fgetc(fp);else if(buff0=/&ch=/)while(ch!=n)ch=fgetc(fp); elsei=1;while(strchr(yun,ch)0)buffi=ch;i+;ch=fgetc(fp);buffi=0;fseek(fp,-1,1);k=0;while(kfuhao)&strcmp(buff,bk)k+;if(k=0;-i)data+=(ai-0)*t;t*=10;if(data=0)cout0=0;-i)coutci;coutendl;*/void output(int n,char *m)switch(n)case 1:cout关键字:mendl;break;case 2:cout标识符:mendl;break;case 3:cout分界符:mendl;break;case 4:cout运算符:mendl;break;case 5:cout常数:mendl;break;default:cout错误:mendl;break;void main() /*主函数*/FILE *fp; char filename20,sh;printf(Type the file name which you want to open:);scanf(%s,&filename);fp=fopen(filename,r); /*以r-只读方式打开