注释转换:
由C语言的注释全部转换为C++的注释风格。
什么是有限状态机?
有限状态机FSM是软件上常用的一种处理方法,它把复杂的控制逻辑分解成有限个稳定状态,在每个状态上进行处理。
有限状态机是闭环系统,可以用有限的状态,处理无穷的事务。
// 通常我们使多路分之语句来处理状态机
switch (state)
{
case 1:
// ...
break ;
case 2:
// ...
break ;
case 3:
// ...
break ;
.
.
.
case n :
break ;
default :
}代码实现:
//AnnotationConvert.h
#ifndef __ANNOTATION_CONVERT_H__
#define __ANNOTATION_CONVERT_H__
#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
#include <stdlib.h>
#define READ_FILE_NAME "input.c"
#define WRITE_FILE_NAME "output.c"
typedef enum STATE
{
NUL_STATE,
C_STATE,
CPP_STATE,
END_STATE
}STATE;
void DoConvertWork(char *readfile,char *writefile);
void AnnotationConvert();
#endif //__ANNOTATION_CONVERT_H__//AnnotationConvert.c
#include "AnnotationConvert.h"
//STATE
STATE g_state = NUL_STATE;
void DoNulState(FILE *pfRead,FILE *pfWrite)
{
int first = 0;
int second = 0;
first = fgetc(pfRead);
switch (first)
{
case ‘/‘:
second = fgetc(pfRead);
if (second == ‘*‘)
{
fputc(‘/‘, pfWrite);
fputc(‘/‘, pfWrite);
g_state = C_STATE;
}
else if (second == ‘/‘)
{
fputc(first, pfWrite);
fputc(second, pfWrite);
g_state = CPP_STATE;
}
else
{
fputc(first, pfWrite);
fputc(second, pfWrite);
}
break;
case EOF:
g_state = END_STATE;
break;
default:
fputc(first, pfWrite);
break;
}
}
void DoCState(FILE *pfRead,FILE *pfWrite)
{
int first = 0;
int second = 0;
first = fgetc(pfRead);
switch(first)
{
case ‘*‘:
second = fgetc(pfRead);
if (second == ‘/‘)
{
int next = fgetc(pfRead);
if (next != ‘\n‘)
{
fputc(‘\n‘, pfWrite);
fputc(next, pfWrite);
}
else
{
fputc(next,pfWrite);
}
g_state = NUL_STATE;
}
else
{
fputc(first, pfWrite);
ungetc(second, pfRead);
}
break;
case ‘\n‘:
fputc(first, pfWrite);
fputc(‘/‘, pfWrite);
fputc(‘/‘, pfWrite);
break;
case EOF:
g_state = END_STATE;
break;
default:
fputc(first, pfWrite);
}
}
void DoCppState(FILE *pfRead,FILE *pfWrite)
{
int first = 0;
first = fgetc(pfRead);
switch(first)
{
case ‘\n‘:
fputc(first, pfWrite);
g_state = NUL_STATE;
break;
case EOF:
g_state = END_STATE;
break;
default:
fputc(first, pfWrite);
}
}
void DoConvertWork(char *readfile,char *writefile)
{
FILE* pfRead = NULL;
FILE* pfWrite = NULL;
pfRead = fopen(readfile,"r");
if (pfRead == NULL)
{
perror("open file for read");
exit(EXIT_FAILURE);
}
pfWrite = fopen(writefile,"w");
if (pfWrite == NULL)
{
fclose(pfRead);
perror("open file for write");
exit(EXIT_FAILURE);
}
//转换
while (g_state != END_STATE)
{
switch (g_state)
{
case NUL_STATE:
DoNulState(pfRead,pfWrite);
break;
case C_STATE:
DoCState(pfRead,pfWrite);
break;
case CPP_STATE:
DoCppState(pfRead,pfWrite);
break;
case END_STATE:
return;
}
}
fclose(pfRead);
fclose(pfWrite);
}
void AnnotationConvert()
{
DoConvertWork(READ_FILE_NAME,WRITE_FILE_NAME);
}//test.c
#include "AnnotationConvert.h"
void test()
{
AnnotationConvert();
}
int main()
{
test();
system("pause");
return 0;
}//input.c // 1.一般情况 /* int i = 0; */ // 2.换行问题 /* int i = 0; */int j = 0; /* int i = 0; */ int j = 0; // 3.匹配问题 /*int i = 0;/*xxxxx*/ // 4.多行注释问题 /* int i=0; int j = 0; int k = 0; */int k = 0; // 5.连续注释问题 /**//**/ // 6.连续的**/问题 /***/ // 7.C++注释问题 // /*xxxxxxxxxxxx*/ // 8.C注释本身不匹配 /* int i = 0;
//output.c // 1.一般情况 // int i = 0; // 2.换行问题 // int i = 0; int j = 0; // int i = 0; int j = 0; // 3.匹配问题 //int i = 0;/*xxxxx // 4.多行注释问题 // //int i=0; //int j = 0; //int k = 0; // int k = 0; // 5.连续注释问题 // /**/ // 6.连续的**/问题 //* // 7.C++注释问题 // /*xxxxxxxxxxxx*/ // 8.C注释本身不匹配 // int i = 0;
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