Delete the annotation in C/C ++-Finite State Machine (implemented in C language)

Some time ago, I wrote a code to delete the C/C ++ source.ProgramThe structure of the annotated program in is complicated. Now we need to use finite state machines to solve the problem.CodeIf strings and nesting are not taken into account, you need to make a few modifications to them. The Code is as follows:

 

# Include <stdio. h> <br/> Enum {<br/> code, <br/> comment1, // "/**/" type comment <br/> comment2, // "//" type comment <br/>} g_state = Code; <br/> Enum input {<br/> CH, // other characters <br/> success, // "/*" or "*/" <br/> CH2, // "//" <br/> RT, // "/N" <br/>}; <br/> input alter (char CH, file * file) <br/>{< br/> char temp; <br/> If (CH = '/') <br/>{< br/> temp = fgetc (File ); <br/> If (temp = '/') return CH2; <br/> else if (temp = '*') return else; <br/> else <br />{< Br/> fseek (file,-1, 1); <br/> return ch; <br/>}< br/> else if (CH = '*') <br/>{< br/> temp = fgetc (File ); <br/> If (temp = '/') return response; <br/> else <br/>{< br/> fseek (file,-1, 1 ); <br/> return ch; <br/>}< br/> else if (CH = '/N') <br/> return RT; <br/> else <br/> return ch; <br/>}< br/> int main () <br/>{< br/> file * infile = fopen ("infile. CPP "," R "); <br/> file * OUTFILE = fopen (" OUTFILE. CPP", "W"); <br/> input; <br/> If (infile = NULL) <br/>{< br/> printf ("cannot open infile! "); <Br/> return-1; <br/>}</P> <p> char ch; <br/> CH = fgetc (infile ); <br/> while (Ch! = EOF) <br/>{< br/> input = alter (CH, infile); <br/> switch (g_state) <br/>{< br/> case code: <br/> If (input = CH | input = RT) fputc (CH, OUTFILE ); <br/> else if (input = inputs) g_state = comment1; <br/> else if (input = CH2) g_state = comment2; <br/> else; <br/> break; <br/> case comment1: <br/> If (input = inputs) g_state = Code; <br/> break; <br/> case comment2: <br/> If (input = RT) <br/>{< br/> fputc ('/N', OUTFILE); <br/> g_state = Code; <br/> break; <br/>}< br/> CH = fgetc (infile ); <br/>}</P> <p> printf ("complete! "); <Br/> getchar (); <br/> fclose (infile); <br/> fclose (OUTFILE); <br/> return 0; <br/>}< br/>