/* Lex code to count total number of tokens */
%{
int n = 0;
%}
 
// Rule section
%%
// Count number of keywords
"while"|"if"|"else" { n++; printf("\t keywords: %s", yytext); }
 
// Count number of data types
"int"|"float" { n++; printf("\t data type: %s", yytext); }
 
// Count number of identifiers
[a-zA-Z_][a-zA-Z0-9_]* { n++; printf("\t identifier: %s", yytext); }
 
// Count number of operators
"<="|"=="|"="|"++"|"-"|"*"|"+" { n++; printf("\t operator: %s", yytext); }
 
// Count number of separators
[(){}|, ;] { n++; printf("\t separator: %s", yytext); }
 
// Count number of floats
[0-9]*"."[0-9]+ { n++; printf("\t float: %s", yytext); }
 
// Count number of integers
[0-9]+ { n++; printf("\t integer: %s", yytext); }
. ;
 
%%
 
int main() {
    yylex();
    printf("\nTotal number of tokens = %d\n", n);
}
 

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