C注释转换到C++注释项目
.h文件
#ifndef
__COMMENT_CONVERT_H__
#define
__COMMENT_CONVRET_H__
#include
<stdio.h>
#include
<stdlib.h>
#define
INPUTFILENAME
"input.c"
#define
OUTPUTFILENAME
"output.c"
typedef
enum
CONVERT_STATE
{
NULL_STATE,
C_STATE,
CPP_STATE,
END_STATE
}
StateType
;
void
CommentConvert();
void
ConvertWork(
FILE
*read,
FILE
*write);
void
DoNullState(
FILE
*read,
FILE
*write);
void
DoCState(
FILE
*read,
FILE
*write);
void
DoCppState(
FILE
*read,
FILE
*write);
#endif
.c文件
#define
_CRT_SECURE_NO_WARNINGS
1
#include
"CommentConvert.h"
StateType
state;
void
DoCppState(
FILE
*
read
,
FILE
*
write
)
{
int
first = fgetc(
read
), second = 0;
switch
(first)
{
case
'\n'
:
fputc(first,
write
);
state = NULL_STATE;
break
;
case
EOF
:
//fputc(first, write);
state = END_STATE;
break
;
default
:
fputc(first,
write
);
break
;
}
}
void
DoCState(
FILE
*
read
,
FILE
*
write
)
{
int
first = fgetc(
read
), second = 0,third=0;
switch
(first)
{
case
'*'
:
second = fgetc(
read
);
if
(second ==
'/'
)
{
third = fgetc(
read
);
if
(third ==
'\n'
)
fputc(third,
write
);
else
{
ungetc(third,
read
);
fputc(
'\n'
,
write
);
}
state = NULL_STATE;
}
else
if
(second ==
'*'
)
{
ungetc(second,
read
);
fputc(first,
write
);
}
else
{
fputc(first,
write
);
fputc(second,
write
);
}
break
;
case
'\n'
:
fputc(first,
write
);
fputc(
'/'
,
write
);
fputc(
'/'
,
write
);
break
;
case
EOF
:
//fputc(first, write);
state = END_STATE;
break
;
default
:
fputc(first,
write
);
break
;
}
}
void
DoNullState(
FILE
*
read
,
FILE
*
write
)
{
int
first = fgetc(
read
), second = 0;
switch
(first)
{
case
'/'
:
second = fgetc(
read
);
if
(second ==
'/'
)
{
state = CPP_STATE;
fputc(first,
write
);
fputc(second,
write
);
//
}
else
if
(second ==
'*'
)
{
fputc(first,
write
);
fputc(
'/'
,
write
);
state = C_STATE;
}
else
{
fputc(first,
write
);
fputc(second,
write
);
}
break
;
case
EOF
:
fputc(first,
write
);
state = END_STATE;
break
;
default
:
fputc(first,
write
);
break
;
}
}
void
ConvertWork(
FILE
*
read
,
FILE
*
write
)
{
state = NULL_STATE;
while
(state != END_STATE)
{
switch
(state)
{
case
NULL_STATE:
DoNullState(
read
,
write
);
break
;
case
C_STATE:
DoCState(
read
,
write
);
break
;
case
CPP_STATE:
DoCppState(
read
,
write
);
break
;
}
}
}
void
CommentConvert()
{
FILE
*pRead, *pWrite;
pRead = fopen(
INPUTFILENAME
,
"r"
);
if
(pRead ==
NULL
)
{
perror(
"INPUTFILENAME"
);
system(
"pause"
);
exit(
EXIT_FAILURE
);
}
pWrite = fopen(
OUTPUTFILENAME
,
"w"
);
if
(pWrite ==
NULL
)
{
perror(
OUTPUTFILENAME
);
fclose(pRead);
system(
"pause"
);
exit(
EXIT_FAILURE
);
}
ConvertWork(pRead, pWrite);
fclose(pRead);
fclose(pWrite);
}
测试部分
#define
_CRT_SECURE_NO_WARNINGS
1
#include
"CommentConvert.h"
void
Test()
{
CommentConvert();
}
int
main()
{
Test();
system(
"pause"
);
return
0;
}
input.c
output.c
利用状态机把此问题中涉及的分为3个状态，即C状态，C++状态，NULL状态，当遍历到某一个\n，/*,//时，要分情况这三个状态之间转换