# 本篇博客为简单的注释转换实现,功能为将简单的C注释段落转换为CPP注释
@ 注意: 代码中所用到的fopen,fwrite,fread等文件操作函数在通讯录文件流博客中做了介
@ ungetc 函数是将从文件中读取的一个字符还回到缓冲区,即文件中去;
@ 分析思路图
@分析思路图
# 自定义头文件部分:
#ifndef __COMMENT_CONVERT_H__
#define __COMMENT_CONVERT_H__
#include<stdio.h>
#include<stdlib.h>
#define INPUTFILENAME "input.c"
#define OUTPUTFILENAME "output.c"
typedef enum CONVERT_START//枚举表示操作选项;
{
NULL_START,
C_START,
CPP_START,
END_START
}StateType;
void CommentConvert();
void ConvertWork(FILE *read,FILE *write);//注释转换操作选项函数;
void DoCState(FILE *read,FILE *write);//C 转换为 cpp函数;
void DoNullState(FILE *read,FILE *write);//普通语句空转换函数;
void DoCppState(FILE *read,FILE *write);//cpp 转换 C 函数;
#endif //__COMMENT_CONVERT_H__
# 函数功能实现部分:
#define _CRT_SECURE_NO_WARNINGS 1
#include"CommentConvert.h"
StateType state;
void DoNullState(FILE *read,FILE *write)//无转换操作函数;
{
int first = fgetc(read);
int second;
switch(first)
{
case'/':
second = fgetc(read);
if(second == '*')
{
fputc(first,write);
fputc('/',write);
state = C_START ;//如果是C注释我们将状态改为C状态,并且将注释开头改为Cpp注释;
}
else if(second == '/')
{
fputc(first,write);
fputc(second,write);
state = CPP_START ; //如果是Cpp注释我们将状态改为Cpp状态;
}
else //普通语句就直接写入;
{
fputc(first,write);
fputc(second,write);
}
break;
case EOF:
fputc(first,write);
state = END_START ;//注释结束,状态调整;
break;
default://开始就为普通内容,直接写入;
fputc(first,write);
break;
}
}
void DoCState(FILE *read,FILE *write)//C转换为Cpp;
{
int first = fgetc(read);
int second = 0;
switch(first)
{
case '*':
second = fgetc(read);
if(second == '/')//舍弃 */;
{
int third = fgetc(read);
state = NULL_START ;
if(third != '\n')
{
fputc('\n',write);
ungetc(third,read);//ungetc函数的功能是将已读数据还回缓冲区;
}
if(third == '\n')
{
fputc(third,write);
}
}
else
{
fputc(first,write);
ungetc(second,read);//将*之后的内容还回缓冲区;
}
break;
case '\n'://如果是换行,那就是连续注释,就将下一行开头加入Cpp注释;
fputc(first,write);
fputc('/',write);
fputc('/',write);
break;
case EOF:
fputc(first,write);
state = END_START ;
break;
default:
fputc(first,write);
break;
}
}
void DoCppState(FILE *read,FILE *write)//Cpp转换为C;
{
int first = 0;
first = fgetc(read);
switch(first)
{
case'\n'://Cpp注释的换行就是一行注释的结束;
fputc(first,write);
state = NULL_START ;
break;
case EOF:
fputc(first,write);
state = END_START ;
break;
default :
fputc(first,write);
break;
}
}
void ConvertWork(FILE *read,FILE *write)//函数操作选项;
{
state = NULL_START ;//一开始我们选择无状态
while(state != END_START )
{
switch(state)
{
case NULL_START :
DoNullState(read,write);
break;
case C_START :
DoCState(read,write);
break;
case CPP_START :
DoCppState(read,write);
break;
default:
break;
}
}
}
void CommentConvert()//读写文件函数;
{
FILE *pWrite = NULL;
//打开提前编辑好的"input.c"文件;
FILE *pRead = fopen(INPUTFILENAME,"r");
if(pRead == NULL)
{
perror("open file for read");
exit(EXIT_FAILURE );
}
//写入新创建的"output.c"文件;
pWrite = fopen(OUTPUTFILENAME, "w");
if(pWrite == NULL)
{
fclose(pRead );
perror ("open file for write");
exit(EXIT_FAILURE );
}
//调用操作选项函数;
//关闭已经打开的文件;
ConvertWork(pRead,pWrite);
fclose(pRead );
fclose (pWrite );
}
# 主函数部分:
#include"CommentConvert.h"
void test()
{
CommentConvert();
}
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*/
# 函数执行结果 “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*/
简单的注释转换功能, 功能比较单一,有时间我会继续完善!
Ps: 爱拼才会赢!
Thanks!