C语言编写注释风格转换

川长思鸟来 2022-06-17 03:36 354阅读 0赞

首先先来看看转换之前的文件注释：

![Center][]

经过分析，我们发现这些注释无非就是在下面四种情况之间进行转换，所以可以很容易编写出代码

![Center 1][]

接下来编写我们的代码

**1.Commentconvert.h**

#define _CRT_SECURE_NO_WARNINGS 1
    
    #ifndef __COMMENT_CONVERT_H__
    #define __COMMENT_CONVERT_H__
    
    #include <stdio.h>
    #include <stdlib.h>
    
    enum STATE
    {
    	NUL_STATE,//正常状态
    	C_STATE,  //C注释状态
    	CPP_STATE,//C++注释状态
    	END_STATE //文件结束
    };
    
    void DoCState(FILE *pfIn, FILE *pfOut, enum STATE *s);
    void DoCppState(FILE *pfIn, FILE *pfOut, enum STATE *s);
    void DoNulState(FILE *pfIn, FILE *pfOut, enum STATE *s);
    void DoConvetWork(FILE *pfIn, FILE *pfOut);
    
    #endif //__COMMENT_CONVERT_H__

**2.Commentconvert.c**

#define _CRT_SECURE_NO_WARNINGS 1
    
    #include "CommentConvert.h"
    
    
    void DoConvetWork(FILE *pfIn, FILE *pfOut)
    {
    	enum STATE state = NUL_STATE;
    	while (state != END_STATE)
    	{
    		switch (state)
    		{
    		case NUL_STATE:
    			DoNulState(pfIn, pfOut, &state);
    			break;
    		case C_STATE:
    			DoCState(pfIn, pfOut, &state);
    			break;
    		case CPP_STATE:
    			DoCppState(pfIn, pfOut, &state);
    			break;
    		default:
    			break;
    		}
    	}
    }
    void DoNulState(FILE *pfIn, FILE *pfOut, enum STATE *s)
    {
    	int first = 0;
    	int second = 0;
    	first = fgetc(pfIn);
    	switch (first)
    	{
    	case '/':
    	{
    				second = fgetc(pfIn);
    				if (second == '*')
    				{
    					fputc('/', pfOut);
    					fputc('/', pfOut);
    					*s = C_STATE;
    				}
    				else if (second == '/')
    				{
    					fputc(first, pfOut);
    					fputc(second, pfOut);
    					*s = CPP_STATE;
    				}
    				else
    				{
    					fputc(first, pfOut);
    					fputc(second, pfOut);
    				}
    	}
    		break;
    	case EOF:
    	{
    				*s = END_STATE;
    	}
    		break;
    	default:
    		fputc(first, pfOut);
    		break;
    	}
    }
    
    void DoCState(FILE *pfIn, FILE *pfOut, enum STATE *s)
    {
    	int first = 0;
    	int second = 0;
    	int third = 0;
    	first = fgetc(pfIn);
    	switch (first)
    	{
    	case '\n':
    	{
    				 fputc(first, pfOut);
    				 fputc('/', pfOut);
    				 fputc('/', pfOut);
    	}
    		break;
    	case '*':
    	{
    				second = fgetc(pfIn);
    				switch (second)
    				{
    				case '/':
    				{
    							*s = NUL_STATE;
    							third = fgetc(pfIn);
    							if (third == '\n')
    							{
    								fputc(third, pfOut);
    							}
    							else if (third == '/')
    							{
    								ungetc(third, pfIn);
    								fputc('\n', pfOut);
    							}
    							else
    							{
    								fputc('\n', pfOut);
    								fputc(third, pfOut);
    							}
    				}
    					break;
    				case '*':
    				{
    							fputc(second, pfOut);
    							ungetc('*', pfIn);
    				}
    					break;
    				default:
    					fputc(first, pfOut);
    					fputc(second, pfOut);
    					break;
    				}
    
    	}
    		break;
    	case EOF:
    		*s = END_STATE;
    		break;
    	default:
    		fputc(first, pfOut);
    		break;
    	}
    }
    void DoCppState(FILE *pfIn, FILE *pfOut, enum STATE *s)
    {
    	int first = 0;
    	first = fgetc(pfIn);
    	switch (first)
    	{
    	case '\n':
    	{
    				 fputc(first, pfOut);
    				 *s = NUL_STATE;
    	}
    		break;
    	case EOF:
    		*s = END_STATE;
    		break;
    	default:
    		fputc(first, pfOut);
    		break;
    	}
    }

**3.test.c**

#define _CRT_SECURE_NO_WARNINGS 1
    
    #include "CommentConvert.h"
    
    void test()
    {
    	FILE *pfIn = NULL;
    	FILE *pfOut = NULL;
    	pfIn = fopen("input.c", "r");
    	if (pfIn == NULL)
    	{
    		perror("open file for read.");
    		exit(EXIT_FAILURE);
    	}
    	pfOut = fopen("output.c", "w");
    	if (pfOut == NULL)
    	{
    		perror("open file for write.");
    		fclose(pfIn);
    		exit(EXIT_FAILURE);
    	}
    	DoConvetWork(pfIn, pfOut);
    	fclose(pfIn);
    	fclose(pfOut);
    }
    
    int main()
    {
    	test();
    	system("pause");
    	return 0;
    }

接下来执行程序之后我们再来看看转换之后的文件注释：

**![Center 2][]**

这样我们的注释转换就完成了

[Center]: /images/20220617/0860e2c8d3c04f3c89a29585ebb5ad9e.png
[Center 1]: /images/20220617/6ed52f7bfe0a448aa44dacd90028667f.png
[Center 2]: /images/20220617/f7bc96e04be143748c1cc8e93d252791.png