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  1. %{
  2. #include<stdio.h>
  3. %}
  4.  
  5. %%
  6. [0-9]+              { printf("This is an Integer number\n"); }
  7.  
  8. [0-9]+"."[0-9]+     { printf("This is a Float number\n"); }
  9.  
  10. [a-zA-Z_][a-zA-Z0-9]*   { printf("This is an Invalid number\n"); }
  11.  
  12. .                   { printf("Unknown input\n"); }
  13. %%
  14.  
  15. int main()
  16. {
  17.     printf("Enter the number you want to check:\n");
  18.     yylex();
  19.     return 0;
  20. }
  21.  
  22. int yywrap()
  23. {
  24.     return 1;
  25. }
Success #stdin #stdout #stderr 0.02s 6908KB
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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/YKuHyg/prog:2:1: Syntax error: Operator expected
ERROR: /home/YKuHyg/prog:25:0: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/6zqs9V
language:
Prolog (swi 7.6.4)
created:
2 hours ago
visibility:
public

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