Lex Program to Identify Tokens
This is the Lex Program to identify tokens in a program using regular expressions
[cc lang=”c”]
%{
#include
%}
%%
bool|int|float printf(“Keyword”);
[-,+]?[0-9]+ printf(“Constants”);
[,.'”]+ printf(“Punctuation Chars”);
[!@#$%^&*()]+ printf(“Special Chars”);
[a-zA-Z]+ printf(“Identifiers”);
%%
main(){yylex();}
[/cc]
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