將C語言註釋轉換爲C++註釋

將C語言註釋轉換爲C++註釋

代碼思路：

CommentConvert.h
#define _CRT_SECURE_NO_WARNINGS 1


#ifndef __COMMENTCONVERT_H__  
#define __COMMENTCONVERT_H__    

#include<stdio.h>  
#include<stdlib.h>  

enum STATE   
{  
    NUL_STATE,  
    C_STATE,  
    CPP_STATE,  
    END_STATE  
};  

void CommentConvert();   
void DoConvert(FILE *pfIn,FILE *pfOut,enum STATE *psta);   
void NulConvert(FILE *pfIn, FILE *pfOut, enum STATE *psta);   
void CConvert(FILE *pfIn, FILE *pfOut, enum STATE *psta);  
void CppCovert(FILE *pfIn, FILE *pfOut, enum STATE *psta);  

#endif  



CommentConvert.c
#define _CRT_SECURE_NO_WARNINGS 1

#include "CommentConvert.h"
void CommentConvert()
{
    FILE *pfIn = NULL;
    FILE *pfOut = NULL;
     enum STATE psta = NUL_STATE;  
    pfIn = fopen("input.c","r");  
    if (pfIn == NULL)  
    {  
        perror("input.c");  
        exit(EXIT_FAILURE);  
    }
    pfOut = fopen("output.c","w");
    if(pfOut == NULL)
    {
        perror("output");
        fclose(pfIn);
        exit(EXIT_FAILURE);
    }
    DoConvert(pfIn,pfOut,&psta);
    fclose(pfIn);
    fclose(pfOut);
}
void DoConvert(FILE *pfIn,FILE *pfOut,enum STATE *psta)
{
     while (*psta != END_STATE)  
    {  
        switch (*psta)  
        {  
        case C_STATE:  
            CConvert(pfIn, pfOut, psta);  
            break;  
        case CPP_STATE:  
            CppCovert(pfIn, pfOut, psta);  
            break;  
        case NUL_STATE:  
            NulConvert(pfIn, pfOut, psta);  
            break;  
        default:  
            break;  
        }  
    }  
    printf("轉換成功！\n");  
}  
void NulConvert(FILE *pfIn, FILE *pfOut, enum STATE *psta)  
{  
    int first = 0;  
    int second = 0;  
    first = fgetc(pfIn);  
    switch (first)  
    {  
    case '/' :  

        second = fgetc(pfIn);    
        switch (second)  
        {  
        case '*':               
            fputc('/',pfOut);  
            fputc('/', pfOut);  
            *psta = C_STATE;      
            break;  
        case '/':              
            fputc('/', pfOut);  
            fputc('/', pfOut);  
            *psta = CPP_STATE;  
            break;  
        default:               
            ungetc(second,pfIn);      
            *psta = NUL_STATE;     
            break;  
        }  
        break;  
    case EOF :                       
        *psta = END_STATE;  
        break;  
    default:                          
        fputc(first,pfOut);  
        *psta = NUL_STATE;  
        break;  
    }  
}  
void CConvert(FILE *pfIn, FILE *pfOut, enum STATE *psta)     
{  
    int first = 0;  
    int second = 0;  
    int third = 0;  
    first = fgetc(pfIn);  
    switch (first)  
    {  
    case '*':             
        second = fgetc(pfIn);          
        switch (second)  
        {  
        case '/':               
            third = fgetc(pfIn);  
            if (third != '\n' && third != EOF)  
                ungetc(third,pfIn);  
            fputc('\n', pfOut);  
            *psta = NUL_STATE;  
            break;  
        default:  
            ungetc(second,pfIn);  
            fputc(first,pfOut);  
            *psta = C_STATE;  
            break;  
        }  
        break;  
    case '\n':            
        fputc('\n',pfOut);  
        fputc('/', pfOut);  
        fputc('/', pfOut);  
        *psta = C_STATE;  
        break;  
    default:  
        fputc(first,pfOut);  
        *psta = C_STATE;  
        break;  
    }  
}  
void CppCovert(FILE *pfIn, FILE *pfOut, enum STATE *psta)  
{  
    int first = 0;  
    first = fgetc(pfIn);  
    switch (first)  
    {  
    case '\n':  
        fputc(first,pfOut);  
        *psta = NUL_STATE;  
        break;  
    case EOF:  
        *psta = END_STATE;  
        break;  
    default:  
        fputc(first,pfOut);  
        *psta = CPP_STATE;  
        break;  
    }  
} 


test.c
#include "CommentConvert.h"
#define _CRT_SECURE_NO_WARNINGS 1

int main()
{
    CommentConvert();
    return 0;
}

測試結果：