C语言编写注释风格转换

来源：互联网发布：java基础面试题2017 编辑：程序博客网时间：2024/05/18 02:55

首先先来看看转换之前的文件注释：

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

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：

这样我们的注释转换就完成了

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