注释转换（c转换为c++）

//input.c中要处理的情况如下

input.c

/*int i = 0;*/
/*int y = 0;*/int j = 0;
/*int x = 0;/*12345678*/
/*
int h = 0;
int g = 0;
int j = 0;
*/int q = 0;
/**//**/
/* ****** */

// /*1234567890*/

源文件annotationconvert.c

 

 

#include
#include
#include
#pragma warning(disable:4996)

typedef enum state
{
	file_error,   //文件错误
	file_success, //文件成功
	other_error, //其他错误
	no_match,   //文件不匹配
}sta;
typedef enum tag
{
	tag_begin,		//注释中
	tag_end,		//不在注释中
}tag;

sta annotationconvert(file* infile, file* outfile)
{
	char firstch, secondch;
	int next;
	assert(infile);
	assert(outfile);
	tag a = tag_end;

	do{
		
		firstch = fgetc(infile);
		switch (firstch)
		{
		case'/':
			secondch = fgetc(infile);
			if (secondch == '*' && a == tag_end)
			{
				fputc('/', outfile);
				fputc('/', outfile);
				a = tag_begin;
			}
	       else if (secondch == '/')
			{
			   fputc(firstch, outfile);
			   fputc(secondch, outfile);
				next = fgetc(infile);
				while (next != eof && next != '
')
				{
					fputc(next, outfile);
					next = fgetc(infile);
				}
			    a = tag_end;
			}
			else
			{
				fputc(firstch, outfile);
				fputc(secondch, outfile);
			}
			break;
		case'*':
			secondch = fgetc(infile);
			if (secondch == '/')
			{
				fputc('
', outfile);
				a = tag_end;
			}
			else if (secondch == '*')
			{
				fputc(firstch, outfile);
				fseek(infile, -1, seek_cur);
			}
			else
			{
				fputc(firstch, outfile);
				fputc(secondch, outfile);
			}
			break;
		case'
':
			if (a == tag_begin)
			{
				fputc(firstch, outfile);
				fputc('/', outfile);
				fputc('/', outfile);
			}
			else
			{
				fputc(firstch, outfile);
			}
			break;
		default:
			fputc(firstch, outfile);
			break;
		}
	} while (firstch != eof);
	if (a == tag_end)
	{
		return file_success;
	}
	else
	{
		return no_match;
	}
	return 0;
}
sta startconvert()
{
	sta  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_error;
	}
	if (outfile == null)
	{
		fclose(infile);
		return file_error;
	}

	s = annotationconvert(infile, outfile);

	fclose(infile);
	fclose(outfile);
	return s;
}

int main()
{
	sta ret = startconvert();
	if (ret == file_error)
	{
		printf(文件错误:%d
, errno);
	}
	else if (ret == file_success)
	{
		printf(转换成功
);
	}
	else if (other_error)
	{
		printf(其他错误:%d
, errno);
	}
	else
	{
		printf(不匹配
);
	}

	return 0;
}

output.c中结果应如下：

 

 

//int i = 0;


//int y = 0;
int j = 0;
//int x = 0;/*12345678


//
//int h = 0;
//int g = 0;
//int j = 0;
//
int q = 0;
//
//


// ******


// /*1234567890*/