C Language Project-comment conversion (c--c++)

Title Requirements:

To convert all C-style annotations to C + + style annotations, as shown in, you need to convert the input.c file to the output.c file as shown in the comment translator.

Here is the test result:

650) this.width=650; "src=" Http://s1.51cto.com/wyfs02/M01/81/F2/wKioL1dGTGSh7TG4AAB6kejxscw601.png "title=" Test Results " alt= "Wkiol1dgtgsh7tg4aab6kejxscw601.png"/>

First of all, we will analyze this topic, in doing this project, we need to introduce the concept of finite state machine. Let's start by understanding what a finite state machine is.

The FSM of finite state machine is a common method in software, and he divides the complicated control logic into a finite stable state, which is processed in each state.

Let's draw a state diagram:

650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M02/81/F2/wKioL1dGTfShqABLAABKmzJS4fA849.png "title=" state decomposition " alt= "Wkiol1dgtfshqablaabkmzjs4fa849.png"/> So we split the project into these states.

Nul_state, C_state, Cpp_state, emd_state

Now let's implement this project.

"CommentConvert.h"

 #ifndef   __comment_convert_h__#define  __comment_ convert_h__#include<stdio.h> #include <stdlib.h> #define  INPUTFILENAME  "input.c" #define  OUTPUTFILENAME  "Output.c" enum state{nul_state,c_state,cpp_state,emd_state};void  Commentconvert (File *pread,file *pwrite); void do_nul_state (File *pread,file *pwrite); Void do_c_state (File *pread,file *pwrite); Void do_cpp_state (FILE *pRead,FILE * Pwrite); #endif  //__comment_convert_h__ 

< Span style= "MARGIN:0PX;PADDING:0PX;LINE-HEIGHT:NORMAL;FONT-SIZE:24PX;" >

#include "CommentConvert.h" Enum state state;void commentconvert (file *pread,file * Pwrite) {while (state!=emd_state) {switch (state) {case nul_state:do_nul_state (pread,pwrite); break;case c _state:do_c_state (Pread,pwrite); break;case cpp_state:do_cpp_state (pread,pwrite); Break;case EMD_STATE : Break;}}} Void do_nul_state (file *pread,file *pwrite) {int first=0;int second=0;first =  fgetc (pRead), switch (first) {case  '/': {second=fgetc (PRead), if (second== ' * ') {FPUTC ('/', pwrite); FPUTC ('/ ', pwrite); state=c_state;} Else if (second== '/') {FPUTC (first,pwrite); FPUTC (second,pwrite); state=cpp_state;} ELSE{FPUTC (First,pwrite); FPUTC (Second,pwrite);}} BREAK;CASE EOF:STATE=EMD_STATE;BREAK;DEFAULT:FPUTC (first,pwrite); break;}} Void do_c_state (File *pread,file *pwrite) {int first=0;int second=0;int third=0; First = fgetc (pRead), switch (first) {case  ' * ':        &NBSp {second=fgetc (pRead); switch (second) {case  '/': Third=fgetc (PRead), if (third!= ' \ n ') {FPUTC (' \ n ', pwrite);// FPUTC ('/', pwrite);//FPUTC ('/', pwrite); state=cpp_state;}     if (third== '/') {ungetc (third,pread); state=nul_state;break;} ELSE{FPUTC (third,pwrite); state=nul_state;break;} Case ' * ': third=fgetc (PRead), FPUTC (First,pwrite), if (third== '/') {state=nul_state;} BREAK;DEFAULT:FPUTC (First,pwrite); FPUTC (second,pwrite); break;} Break;case ' \ n ': FPUTC (First,pwrite); FPUTC ('/', pwrite); FPUTC ('/', pwrite);break;case eof:state=emd_state; BREAK;DEFAULT:FPUTC (first,pwrite); break;}}} Void do_cpp_state (file *pread,file *pwrite) {int first=0;first = fgetc (pRead); Switch (first) {case  ' \ n ': {FPUTC (first,pwrite);//FPUTC ('/', pwrite);//FPUTC ('/', pwrite); state=nul_state;} BREAK;CASE EOF:STATE=EMD_STATE;BREAK;    DEFAULT:FPUTC (first,pWrite); break;}}

"TEST.c"

#include "CommentConvert.h" int main () {FILE *pread = NULL; FILE *pwrite = null;printf ("Comment Conversions Start:");p Read=fopen (InputFileName, "R"), if (NULL ==pread) {perror ("Open file for read\n"); Exit (exit_failure);} Pwrite=fopen (OutputFileName, "w"), if (NULL ==pwrite) {fclose (pRead);p error ("Open file for write\n"); Exit (exit_failure );} Commentconvert (pread,pwrite);p rintf ("Note conversion Complete:"); return 0;}

This completes the annotation Transformation project.

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C Language Project-comment conversion (c--c++)