Number Each Line - Lex Program - Compiler Design

Program:

%{
int lineno =1;
%}

line .*\n

%%
{line} {printf("%5d %s", lineno++,yytext);}

%%
main()
{
yylex();
return 0;
}


Output:
input: compilerdesign.txt

Design of a Lexical Analyzer using Finite Automation
Design of lexical analyzer using LEX
Design of recursive descent and LL (1) parsers
Implementation of Operator precedence Parsing
Design of parser for arithmetic expressions using YACC
Design of a simple type checker
Generation of IC for arithmetic expressions
Simple code optimization strategies
Design of a code generator
Writing a simple Compiler
                    www.2k8618.blogspot.com
                  
                  
nn@linuxmint ~ $ lex l1.l
nn@linuxmint ~ $ gcc lex.yy.c -lfl
nn@linuxmint ~ $ ./a.out <compilerdesign.txt
    1 Design of a Lexical Analyzer using Finite Automation
    2 Design of lexical analyzer using LEX
    3 Design of recursive descent and LL (1) parsers
    4 Implementation of Operator precedence Parsing
    5 Design of parser for arithmetic expressions using YACC
    6 Design of a simple type checker
    7 Generation of IC for arithmetic expressions
    8 Simple code optimization strategies
    9 Design of a code generator
   10 Writing a simple Compiler
   11                     www.2k8618.blogspot.com