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  1. %{
  2. #include <stdio.h>
  3. %}
  4.  
  5. %%
  6. \+91[0-9]{10} { printf("Valid Phone Number: %s\n", yytext); }
  7. . { /* Ignore other characters */ }
  8. %%
  9.  
  10. int main() {
  11. yylex();
  12. return 0;
  13. }
  14.  
  15. int yywrap() {
  16. return 1;
  17. }
  18.  
Success #stdin #stdout #stderr 0.03s 6916KB
stdin
8769567251
stdout
Standard output is empty
stderr
ERROR: /home/TKhAiL/prog:2:1: Syntax error: Operator expected
ERROR: /home/TKhAiL/prog:17:1: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit