注释转换

#include <stdio.h>
#include <errno.h>
#include <assert.h>

typedef enum STATE
{
SUCCESS, // 成功
FILE_ERROE, // 文件错误
NO_MATCH, // 不匹配
OTHER, // 其他错误
}STATE;

typedef enum TAG
{
TAG_BEGIN, // 在C注释段中
TAG_END, // C注释结束
}TAG;

#pragma warning(disable:4996)

STATE AnnotationConvert(FILE* inFile, FILE* outFile)
{
TAG tag = TAG_END;
char firstCh, secondCh;
assert(inFile);
assert(outFile);

do{
firstCh = fgetc(inFile);
switch (firstCh){
// 1.一般情况
case '/':
secondCh = fgetc(inFile);
if (secondCh == '*'
&& tag == TAG_END)
{
fputc('/', outFile);
fputc('/', outFile);

// 3.匹配问题
tag = TAG_BEGIN;
}
else if(secondCh == '/')
{
char next;
fputc(firstCh, outFile);
fputc(secondCh, outFile);

// 7.C++注释问题
do
{
next = fgetc(inFile);
fputc(next, outFile);
} while (next != '\n'
&& next != EOF);

// 当读到文件尾时，标记firstCh
if(next == EOF)
{
firstCh = EOF;
}
}
else{
fputc(firstCh, outFile);
fputc(secondCh, outFile);
}

break;
case '\n':
fputc('\n',outFile);

// 4.多行注释问题
if (tag == TAG_BEGIN)
{
fputc('/',outFile);
fputc('/',outFile);
}
break;
case '*':
secondCh = fgetc(inFile);
if (secondCh == '/')
{
// 2.换行问题
// 5.连续注释问题
char next = fgetc(inFile);
if (next != '\n' && next != EOF)
{
fseek(inFile, -1, SEEK_CUR);
}

fputc('\n', outFile);

tag = TAG_END;
}
else if(secondCh == '*')
{
// 6.连续的**/问题
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("转换成功\n");
}
else if (ret == NO_MATCH)
{
printf("不匹配\n");
}
else if (ret == FILE_ERROE)
{
printf("文件错误: %d\n", errno);
}
else
{
printf("其他错误: %d\n", errno);
}

return 0;
}