fork download
copy 
  1. %{
  2. #include <stdio.h>
  3. %}
  4.  
  5. // Regular expressions for different token types
  6. %%
  7. "int"|"float"|"char"|"if"|"else"|"for"|"while"       { printf("KEYWORD: %s\n", yytext); }
  8. [a-zA-Z_][a-zA-Z0-9_]*                               { printf("IDENTIFIER: %s\n", yytext); }
  9. [0-9]+                                               { printf("INTEGER: %s\n", yytext); }
  10. [0-9]+"."[0-9]+                                      { printf("FLOAT: %s\n", yytext); }
  11. "=="|"<="|">="|"!="|"<"|">"                          { printf("RELATIONAL OPERATOR: %s\n", yytext); }
  12. "="                                                  { printf("ASSIGNMENT OPERATOR: %s\n", yytext); }
  13. "("                                                  { printf("LEFT PARENTHESIS: %s\n", yytext); }
  14. ")"                                                  { printf("RIGHT PARENTHESIS: %s\n", yytext); }
  15. "{"                                                  { printf("LEFT BRACE: %s\n", yytext); }
  16. "}"                                                  { printf("RIGHT BRACE: %s\n", yytext); }
  17. "+"|"-"|"*"|"/"                                      { printf("ARITHMETIC OPERATOR: %s\n", yytext); }
  18. ";"                                                  { printf("SEMICOLON: %s\n", yytext); }
  19. [ \t\n]+                                             { /* Ignore whitespace */ }
  20. .                                                    { printf("UNKNOWN: %s\n", yytext); }
  21. %%
  22.  
  23. int main() {
  24.     // Start lexical analysis
  25.     yylex();
  26.     return 0;
  27. }
  28.  
  29. int yywrap() {
  30.     return 1;
  31. }
  32.  
Success #stdin #stdout #stderr 0.03s 6888KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Standard output is empty
stderr
copy 
ERROR: /home/8C0abZ/prog:2:1: Syntax error: Operator expected
ERROR: /home/8C0abZ/prog:31:1: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/gzDxYm
language:
Prolog (swi 7.6.4)
created:
1 day ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!