"C Language" annotation conversion--c comments to standard C + + language annotations

first, the specific requirements:

1:C-style comments/*/comments converted to standard C + + style//annotations

2://style annotations remain the same

3: All conversions are subject to grammatical rules

4: Note Translation requires support for comment nesting

Second, the conversion requirements:

There are a lot of nesting cases for annotations, and here's just an example, you need to follow the code of the C + + language annotation rules, and I won't just test the example here.                                                               

Three, the attention matters:

1, except for the following two cases of modification, the source file can not be changed after the conversion of any other changes:
 a. Extra annotations with spaces instead of
 b./* */At the beginning of the note is replaced by//, the end of the line is removed */
2, note the conversion of the following situation
a./******/

b.///*......*/
3. You do not need to consider comments in the input file that do not conform to the grammar rules

Four, the code:

Main.c

#include <stdio.h> #include <errno.h> #include <assert.h>typedef enum state{success,//successful File_erroe, File error no_match,//mismatch other,//other error}state;typedef enum tag{tag_begin,//tag_end,//c comment in C comment paragraph}tag; #pragma warning ( disable:4996) State Annotationconvert (file* inFile, file* outFile) {tag tag = Tag_end;char Firstch, Secondch;assert ( InFile), assert (outFile);d O{firstch = fgetc (inFile), switch (firstch) {//1. General case '/': SECONDCH = fgetc (inFile); if ( SECONDCH = = ' * ' && tag = = tag_end) {FPUTC ('/', outFile), FPUTC ('/', outFile);//3. Match question tag = tag_begin;} else if (secondch = = '/') {char next;fputc (firstch, outFile); FPUTC (SECONDCH, outFile);//7.c++ comment problem do {next = fgetc (InFile) ; Fputc (Next, outFile);} while (next! = ' \ n ' && next! = EOF);//When the end of the file is read, Mark Firstchif (next = EOF) {firstch = EOF;}} ELSE{FPUTC (Firstch, outFile); FPUTC (SECONDCH, outFile);} Break;case ' \ n ': fputc (' \ n ', outFile);//4. Multi-line Comment question if (tag = = Tag_begin) {FPUTC ('/', outFile); FPUTC ('/', outFile);} Break;case ' * ': SECONDCH = FGETC (InFile), if (secondch = = '/') {//2. Line break//5. Continuous comment question Char next = fgetc (InFile); if (next! = ' \ n ' && next! = EOF) {FSE Ek (InFile,-1, seek_cur);} FPUTC (' \ n ', outFile); tag = Tag_end;} else if (secondch = = ' * ') {//6. Continuous **/problem fseek (InFile,-1, seek_cur); FPUTC (Firstch, outFile);} ELSE{FPUTC (Firstch, outFile); FPUTC (SECONDCH, outFile);} BREAK;DEFAULT:FPUTC (Firstch, outFile); break;}} while (firstch! = EOF); if (tag = = tag_end) {return SUCCESS;} Else{return No_match;}} int Startconvert () {state s;const char* infilename = "input.c"; const char* outfilename = "output.c"; file* inFile = fopen (Infilename, "R"); file* outFile = fopen (Outfilename, "w"); if (inFile = = NULL) {return file_erroe;} if (OutFile = = NULL) {fclose (inFile); return File_erroe;} s = Annotationconvert (InFile, outFile); fclose (inFile); fclose (outFile); return s;} int main () {state ret = Startconvert (); if (ret = = SUCCESS) {printf ("Conversion succeeded \ n");} else if (ret = = No_match) {printf ("does not match \ n");} else if (ret = = File_erroe) {printf ("File Error:%d\n", errno);} else{printf ("Other error:%d\n ", errno);} return 0;}

Input.c

1. General conditions/* int i = 0; *///2. Line break/* int i = 0; */Int J = 0;//3. Match problem/*int i = 0;/*xxxxx*///4. Multiline comment Problem/*int i=0;int j = 0;int k = 0;*/int k = 0;//5. Continuous comment problem/**//**///6. Continuous **/problem/***///7.c++ Comment question///*xxxxxxxxxxxx*/

V. Examples of use of the environment

     When it comes to writing programs under Windows with the VC2005 environment, there are programs written in the C + + language, but with the comments of C, you can compile the connection to run successfully. But there are also many compilers that do not support a single-line comment for C. And don't want to manually change all the code. A program will be used to automatically replace C's comments with the C + + language annotation format.

"C Language" annotation conversion--c comments to standard C + + language annotations