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  1. %{
  2.   int kcount = 0;
  3.   int icount = 0;
  4.   %}
  5.   keywords (if|else|while|return|for)
  6.   identifiers ([a-zA-Z][a-zA-Z0-9]*)
  7.   %%
  8.   {keywords} {kcount++;}
  9.   {identifiers} {icount++;}
  10.   %%
  11.   void main()
  12.   yylex();
  13.   printf("No.of Keywords: %d\n", kcount);
  14.   printf("No.of Identifiers: %d\n", icount);
  15.   }
  16.   int yywrap()
  17.   {
  18.     return 1;
  19.  
  20.   }
Success #stdin #stdout #stderr 0.03s 6876KB
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Standard input is empty
stdout
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Standard output is empty
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ERROR: /home/foojdr/prog:20:2: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/HGBwIK
language:
Prolog (swi 7.6.4)
created:
94 days ago
visibility:
public

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