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  1. %{
  2.   #include<stdio.h>
  3. %}
  4.  
  5. %%
  6. if |
  7. else |
  8. printf{printf("\n %s is a keyword", yytext)}
  9. [0-9]+ printf{printf("\n %s is a number", yytext)}
  10. [a-zA-Z]+ printf{printf("\n %s is a word", yytext)}
  11. .|\n{ECHO;}
  12. %%
  13.  
  14. int main(){
  15.   printf("enter the string");
  16.   yylex();
  17.  
  18. }
  19. int yywrap(){
  20.   return 1;
  21. } lex(T, R).
  22. lex([X | T], [X | R]) :- lex(T, R).
  23.  
Success #stdin #stdout #stderr 0.02s 6972KB
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stdin
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Standard input is empty
stdout
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Standard output is empty
stderr
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ERROR: /home/6v0YCp/prog:2:3: Syntax error: Operator expected
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/NZsaKI
language:
Prolog (swi 7.6.4)
created:
12 days ago
visibility:
public

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