C/C++註釋轉換

將 / * … * / 註釋轉換爲 / / 註釋。

transform.h

#ifndef __transform_h__
#define __transform_h__

#define MY_INPUT "input.c"
#define MY_OUTPUT "output.c"

void comment_transform_main();

enum STATUS{ NORSTATUS, CSTATUS, CPPSTATUS, EOFSTATUS };

#endif //__transform_h__

transform.c

#include <stdio.h>
#include<assert.h>
#include"transform.h"

enum STATUS status = NORSTATUS;

//處理正常狀態字符
void tra_nor(FILE *ifp, FILE *ofp)
{
    char fc = fgetc(ifp);
    switch (fc)
    {
    case '/':
    {
            fputc('/', ofp);
            char sc = fgetc(ifp);
            switch (sc)
            {
            case '/':
                fputc('/', ofp);
                status = CPPSTATUS;
                break;
            case '*':
                fputc('/', ofp);
                status = CSTATUS;
                break;
            case EOF:
                status = EOFSTATUS;
            default:
                fputc(sc,ofp);
                status = NORSTATUS;
                break;
            }
    }
        break;
    case EOF:
        fputc(fc,ofp);
        status = EOFSTATUS;
        break;
    default:
        fputc(fc, ofp);
        status = NORSTATUS;
        break;
    }

}
//處理c風格註釋中的字符
void tra_c(FILE *ifp, FILE *ofp)
{
    char fc = fgetc(ifp);
    switch (fc)
    {
    case '*':
    {
            char sc = fgetc(ifp);
            switch (sc)
            {
            case '/':
                fputc('\n', ofp);
                status = NORSTATUS;
                break;
            case EOF:
                status = EOFSTATUS;
                break;
            default:
                fputc(fc,ofp);
                fputc(sc, ofp);
                status = CSTATUS;
                break;
            }
    }
        break;
    case '\n':
        fputc(fc, ofp);
        fputc('/', ofp);
        fputc('/', ofp);
        status = CSTATUS;
        break;
    case EOF:
        fputc(fc, ofp);
        status = EOFSTATUS;
        break;
    default:
        fputc(fc, ofp);
        status = CSTATUS;
        break;
    }
}
//處理c++風格註釋中的字符
void tra_cpp(FILE *ifp, FILE *ofp)
{
    char fc = fgetc(ifp);
    switch (fc)
    {
    case '\n':
        fputc(fc, ofp);
        status = NORSTATUS;
        break;
    case EOF:
        fputc(fc, ofp);
        status = EOFSTATUS;
        break;
    default:
        fputc(fc, ofp);
        status = CPPSTATUS;
        break;
    }

}
//處理EOF
void tra_eof(FILE *ifp, FILE *ofp)
{
    return;
}
//轉換函數
void transform(FILE *ifp,FILE *ofp)
{
    while (status != EOFSTATUS)
    {
        switch (status)
        {
        case NORSTATUS:
            tra_nor(ifp, ofp);
            break;
        case CSTATUS:
            tra_c(ifp, ofp);
            break;
        case CPPSTATUS:
            tra_cpp(ifp, ofp);
            break;
        case EOFSTATUS:
            tra_eof(ifp, ofp);
            break;
        default:
            break;
        }
    }
}
//註釋轉換函數
void comment_transform_main()
{
    FILE * ifp = fopen(MY_INPUT,"r");
    FILE * ofp = fopen(MY_OUTPUT, "w");
    assert(ifp);
    assert(ofp);

    transform(ifp, ofp);

    fclose(ifp);
    fclose(ofp);
}

test.c

#include <stdio.h>
#include"transform.h"
#include<windows.h>

int main()
{
    comment_transform_main();
    printf("Complete transformation!\n\n");

    system("pause");
    return 0;
}