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  1. %{
  2. #include <stdio.h>
  3. %}
  4. %%
  5. 0[xX][0-9a-fA-F]+    { printf("%s is a hexadecimal number\n", yytext); }
  6. 0[0-7]+              { printf("%s is an octal number\n", yytext); }
  7. [1-9][0-9]*          { printf("%s is a decimal number\n", yytext); }
  8. 0                    { printf("0 is considered as zero\n"); }
  9. .                    { printf("Invalid input: %s\n", yytext); }
  10. %%
  11.  
  12. int main() {
  13.     yylex();
  14.     return 0;
  15. }
  16.  
  17.  
Success #stdin #stdout #stderr 0.02s 6992KB
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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/wINj9z/prog:2:1: Syntax error: Operator expected
ERROR: /home/wINj9z/prog:16:0: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/TAgrrU
language:
Prolog (swi 7.6.4)
created:
3 days ago
visibility:
public

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