【C语言】注释转换（C语言->C++）

来源：互联网发布：linux当前文件路径编辑：程序博客网时间：2024/06/03 22:39

代码如下

.h文件

#ifndef __COMMENT_CONVERT__#define __COMMENT_CONVERT__#include <stdlib.h>#include <stdio.h>enum STATE{NUL_STATE,C_STATE,CPP_STATE,END_STATE,};void DoConvertWork(FILE *pfIn, FILE *pfOut);void DoNulState(FILE *pfIn, FILE *pfOut);void DoCState(FILE *pfIn, FILE *pfOut);void DoCppState(FILE *pfIn, FILE *pfOut);#endif

text.c文件

#include <stdlib.h>#include <Windows.h>#include "CommentConvert.h"void text(){FILE *pfIn = fopen("input.c", "r");if (NULL == pfIn){perror("open file for read");exit(EXIT_FAILURE);}FILE *pfOut = fopen("output.c", "a");if (NULL == pfOut){perror("open file for write");fclose(pfIn);exit(EXIT_FAILURE);}DoConvertWork(pfIn, pfOut);fclose(pfIn);fclose(pfOut);}int main(){text();system("pause");return 0;}

CommentConvert.c文件

#include "CommentConvert.h"#include <assert.h>enum STATE state = NUL_STATE;void DoConvertWork(FILE *pfIn, FILE *pfOut){while (state != END_STATE){switch (state){case NUL_STATE:DoNulState(pfIn, pfOut);break;case C_STATE:DoCState(pfIn, pfOut);break;case CPP_STATE:DoCppState(pfIn, pfOut);break;default:break;}}}void DoNulState(FILE *pfIn, FILE *pfOut){assert(pfIn);assert(pfOut);int first = fgetc(pfIn);switch (first){case '/':{int second = fgetc(pfIn);if (second == '*')         //如果第二个字符为'*'，则为C语言注释{state = C_STATE;fputc(first, pfOut);fputc('/', pfOut);}else if (second == '/')    //如果第二个字符为'/'，则为CPP注释{state = CPP_STATE;fputc(first, pfOut);fputc(second, pfOut);}break;}case EOF:state = END_STATE;break;default:fputc(first, pfOut);break;}}void DoCState(FILE *pfIn, FILE *pfOut)  //C语言注释转换{assert(pfIn);assert(pfOut);int first = fgetc(pfIn);switch (first){case '*':{int second = fgetc(pfIn);    if (second == '/'){int third = fgetc(pfIn);switch (third){case '\n':fputc(third, pfOut);   // 返回开始处继续寻找注释state = NUL_STATE;break;case '/':                  // 判断是否为连续C语言注释fputc('\n', pfOut);ungetc(third, pfIn);state = NUL_STATE;break;case EOF:state = END_STATE;break;default:fputc('\n', pfOut);fputc(third, pfOut);state = NUL_STATE;break;}}else if (second == '*')       //处理注释行中多余*{fputc(second, pfOut);ungetc(second, pfIn);state = C_STATE;}else{fputc(first, pfOut);fputc(second, pfOut);state = C_STATE;}}break;case '\n':       //判断多行注释fputc(first, pfOut);fputc('/' , pfOut);fputc('/', pfOut);break;default:fputc(first, pfOut);break;}}void DoCppState(FILE *pfIn, FILE *pfOut){assert(pfIn);assert(pfOut);int first = fgetc(pfIn);switch (first){case '\n':    fputc(first, pfOut);state = NUL_STATE;break;case EOF:state = END_STATE;break;default:fputc(first, pfOut);break;}}

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