欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  IT编程

C语言注释转换项目实例讲解及测试结果

程序员文章站 2022-07-05 22:49:34
1.convert_comment.h #ifndef __CONVERT_COMMENT_H__ #define __CONVERT_COMMENT_H__ #in...

1.convert_comment.h

#ifndef __CONVERT_COMMENT_H__
#define __CONVERT_COMMENT_H__

#include 
#include 

#define INPUTFILE "input.c"
#define OUTPUTFILE "output.c"

enum 
{
    CSTATUS, //C注释
    CPPSTATUS, //C++注释
    NULLSTATUS, //普通状态
    EOFSTATUS  //结束状态
};

void convert_comment();
void convert_work(FILE *ifp, FILE *ofp); 

#endif

2.convert_comment.c

#include "convert_comment.h"


int status = NULLSTATUS;

void do_null_status(FILE *ifp, FILE *ofp)
{
    int ch = fgetc(ifp);

    switch (ch)
    {
    case '/':
    {
                int s = fgetc(ifp);
                switch (s)
                {
                case '*':
                    fputc('/', ofp);
                    fputc('/', ofp);
                    status = CSTATUS;
                    break;

                case '/':
                    fputc('/', ofp);
                    fputc('/', ofp);
                    status = CPPSTATUS;
                    break;

                case EOF:
                    status = EOFSTATUS;
                    break;

                default:
                    fputc(ch, ofp);
                    ungetc(s, ifp);
                    status = NULLSTATUS;
                    break;
                }
            break;
    }

    case EOF:
        status = EOFSTATUS;
        break;

    default:
        fputc(ch, ofp);
        status = NULLSTATUS;
        break;
    }
}

void do_cpp_status(FILE *ifp, FILE *ofp)
{
    int ch = fgetc(ifp);
    switch (ch)
    {
    case '\n':
        fputc(ch, ofp);
        status = NULLSTATUS;
        break;
    case EOF:
        status = EOFSTATUS;
        break;
    default:
        fputc(ch, ofp);
        status = CPPSTATUS;
        break;
    }
}

void do_c_status(FILE *ifp, FILE *ofp)
{
    int ch = fgetc(ifp);
    switch (ch)
    {
    case '*':
    {
                int s = fgetc(ifp);
                switch (s)
                {
                case '/':
                    fputc('\n', ofp);
                    status = NULLSTATUS;
                    break;

                default:
                    fputc(ch, ofp);
                    ungetc(s, ifp);
                    status = CSTATUS;
                    break;
                }
            break;
    }

    case '\n':
        fputc(ch, ofp);
        fputc('/', ofp);
        fputc('/', ofp);
        status = CSTATUS;
        break;

    case EOF:
        status = EOFSTATUS;
        break;

    default:
        fputc(ch, ofp);
        status = CSTATUS;
        break;
    }

}

void do_eof_status(FILE *ifp, FILE *ofp)
{
    return;
}


static void convert_work(FILE *ifp, FILE *ofp)
{
    while (status != EOFSTATUS)
    {
        switch (status)
        {
        case NULLSTATUS:
            do_null_status(ifp, ofp);
            break;

        case CPPSTATUS:
            do_cpp_status(ifp, ofp);
            break;

        case CSTATUS:
            do_c_status(ifp, ofp);
            break;

        case EOFSTATUS:
            do_eof_status(ifp, ofp);
            break;

        default:
            break;
        }
    }
}

void convert_comment()
{
    FILE *ifp = fopen(INPUTFILE, "r");
    FILE *ofp = fopen(OUTPUTFILE, "w");

    if (ifp == NULL || ofp == NULL)
    {
        perror("fopen");
        return;
    }

    convert_work(ifp, ofp);

    fclose(ifp);
    fclose(ofp);
}

3.test.c

#include "convert_comment.h"

int main()
{
    convert_comment();

    system("pause");
    return 0;
}

4.测试结果:

C语言注释转换项目实例讲解及测试结果