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  1. %{
  2. #include <stdio.h>
  3. %}
  4.  
  5. %%
  6. \+               { printf("Arithmetic Operator: +\n"); }
  7. \-               { printf("Arithmetic Operator: -\n"); }
  8. \*               { printf("Arithmetic Operator: *\n"); }
  9. \/               { printf("Arithmetic Operator: /\n"); }
  10. \%               { printf("Arithmetic Operator: %%\n"); }
  11.  
  12. =                { printf("Assignment Operator: =\n"); }
  13. \+=              { printf("Assignment Operator: +=\n"); }
  14. \-=              { printf("Assignment Operator: -=\n"); }
  15. \*=              { printf("Assignment Operator: *=\n"); }
  16. \/=              { printf("Assignment Operator: /=\n"); }
  17. \%=              { printf("Assignment Operator: %%=\n"); }
  18.  
  19. &                { printf("Bitwise Operator: &\n"); }
  20. \|               { printf("Bitwise Operator: |\n"); }
  21. \^               { printf("Bitwise Operator: ^\n"); }
  22. ~                { printf("Bitwise Operator: ~\n"); }
  23. <<               { printf("Shift Operator: <<\n"); }
  24. >>               { printf("Shift Operator: >>\n"); }
  25.  
  26. ==               { printf("Relational Operator: ==\n"); }
  27. !=               { printf("Relational Operator: !=\n"); }
  28. <                { printf("Relational Operator: <\n"); }
  29. >                { printf("Relational Operator: >\n"); }
  30. <=               { printf("Relational Operator: <=\n"); }
  31. >=               { printf("Relational Operator: >=\n"); }
  32.  
  33. &&               { printf("Logical Operator: &&\n"); }
  34. \|\|            { printf("Logical Operator: ||\n"); }
  35. !                { printf("Logical Operator: !\n"); }
  36.  
  37. [ \t\n]         { /* Ignore whitespace */ }
  38. .                { printf("Unknown symbol: %s\n", yytext); }
  39. %%
  40.  
  41. int main() {
  42.     yylex();
  43.     return 0;
  44. }
  45.  
  46. int yywrap() {
  47.     return 1;
  48. }
  49.  
Success #stdin #stdout #stderr 0.02s 6948KB
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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/eI7O21/prog:2:1: Syntax error: Operator expected
ERROR: /home/eI7O21/prog:48:1: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/CreT5X
language:
Prolog (swi 7.6.4)
created:
5 days ago
visibility:
public

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