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  1. %}
  2. sign [+-]?
  3. digit [0-9]+
  4. exp ([eE]{sign}{digit})
  5. %%
  6. @ printf(“\n Enter the number:”);
  7. \+?{digit} printf(“\n Number is positive…\n”);
  8. \-{digit} printf(“\n Number is negative…\n”);
  9. {sign}{digit}?\.{digit}? printf(“\n Number is real…\n”);
  10. {sign}{digit}(\.{digit}?)?{exp} printf(“\n Number is exponential…\n”);
  11. %%
  12. int yywrap()
  13. {
  14.     return 1;
  15. }
  16. int main()
  17. {
  18.    yylex();
  19. }
Success #stdin #stdout #stderr 0.02s 6976KB
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Standard input is empty
stdout
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Standard output is empty
stderr
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ERROR: /home/8oi0U2/prog:19:0: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/1RLvE3
language:
Prolog (swi 7.6.4)
created:
1 year ago
visibility:
public

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