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  1. /* Lex program to check whether input is digit or not. */
  2. %{
  3. #include<stdio.h>
  4. #include<stdlib.h>
  5. %}
  6. /* Rule Section */
  7. %%
  8. ^[0-9]*  printf("digit");
  9. ^[^0-9]|[0-9]*[a-zA-Z]  printf("not a digit");
  10. . ;
  11. %%
  12. int main()
  13. {
  14.         // The function that starts the analysis
  15.     yylex();
  16.         return 0;
  17. }
Success #stdin #stdout #stderr 0.03s 6872KB
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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/assMw8/prog:3:1: Syntax error: Operator expected
ERROR: /home/assMw8/prog:17:0: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/bVGLFU
language:
Prolog (swi 7.6.4)
created:
15 days ago
visibility:
public

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