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  1. %{
  2.  
  3.   #include <stdio.h>
  4.   #include<stdio.h>
  5.  
  6.   void reverse(char * str){
  7.   int len=strlen(str);
  8.   for(int i=0;i<len/2;i++){
  9.    char temp= str[i];
  10.    str[i] = str[len-i-1];
  11.    str[len-i-1]=temp;
  12.   }
  13.   }
  14.  
  15. %}
  16.  
  17. %%
  18. [a-zA-Z0-9]+ {reverse(yytext);printf("%s",yytext);}
  19.  
  20. [\t\n]       { printf("%s", yytext); }
  21. .            { printf("%s", yytext); }
  22.  
  23. %%
  24.  
  25. int main(){
  26.  
  27.   yylex();
  28.   return 0;
  29.  
  30. }
  31.  
  32. int yywrap(){
  33.  
  34.   return 1;
  35.  
  36. }
Success #stdin #stdout #stderr 0.03s 6852KB
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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/Tpz6Nx/prog:3:3: Syntax error: Operator expected
ERROR: /home/Tpz6Nx/prog:36:0: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/N7xQnO
language:
Prolog (swi 7.6.4)
created:
12 days ago
visibility:
public

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