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  1. %{
  2.     #include<stdio.h>
  3. }
  4. %%
  5. if|else|while|for|switch {printf("%s is a key word", yytext); }
  6. [a-z A-Z] {printf("%s is a indentifer");}
  7. [0-9] {printf("%s is a constant", yytext); }
  8. .* {printf("It is invalid input"); }
  9. %%
  10.  
  11. void main(){
  12.     printf("Enter value: ");
  13.     yylex();
  14.     return 0;
  15. }
  16.  
  17. int yywrap(){
  18.     return 1;
  19. }
Success #stdin #stdout #stderr 0.02s 6844KB
comments (?)
stdin 
heelo5
stdout 
Standard output is empty
stderr 
ERROR: /home/zSV8Zt/prog:19:0: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/EJSzdr
language:
Prolog (swi 7.6.4)
created:
5 days ago
visibility:
public

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