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  1.  
  2. %% 
  3.  
  4. #.* {printf("\n %s is a Preprocessor", yytext);} 
  5.  
  6. int | 
  7.  
  8. char | 
  9.  
  10. void | 
  11.  
  12. main {printf("\n %s is  a key word",yytext);} 
  13.  
  14. {identifier} {printf("\n %s is identifier",yytext);} 
  15.  
  16. [0-9]+ {printf("\n %s is a NNUMBER",yytext);} 
  17.  
  18. = {printf("\n%s is a Assignment operator",yytext);} 
  19.  
  20. \+ {printf("\n%s is a arthematic operator",yytext);} 
  21.  
  22. %% 
  23.  
  24. int main(int argc, char **argv){ 
  25.  
  26. if(argc>1){ 
  27.  
  28. FILE *f1; 
  29.  
  30. f1 = fopen(argv[1],"r"); 
  31.  
  32. if(f1){ 
  33.  
  34. yyin=f1; 
  35.  
  36. } 
  37.  
  38. } 
  39.  
  40. yylex(); 
  41.  
  42. return 0; 
  43.  
  44. } 
  45.  
  46. int yywrap(){ 
  47.  
  48. return 0; 
  49.  
  50. } 
  51.  
  52.  
Success #stdin #stdout #stderr 0.02s 6892KB
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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/0Pzh1i/prog:51:0: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/3EZdX8
language:
Prolog (swi 7.6.4)
created:
1 year ago
visibility:
public

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