C语言_注释转换

C语言风格注释：

int a=0;/*这          是          注          释*/int b=0;

C++注释风格：

int a=0;//这        //是        //注        //释int b=0;

现写一个程序实现把所有注释全部转换为C++风格保存在另一个文档中。

首先一个一个读取转换，分为三种状态：
1.普通状态：普通代码 ——>{ 普通代码，C注释，C++注释}
2.C状态：C注释 ——>{ 普通代码，C注释，C++注释}
3.C++状态：C++注释 ——>{ 普通代码，C注释，C++注释}
为这三种状态间的转换写了三个函数实现功能：

普通状态：

void do_null_status(FILE *ifp, FILE *ofp){    int a = fgetc(ifp);    fputc(a,ofp);    if ((char)a == '/')    {        a = fgetc(ifp);        if ((char)a == '/')        {            fputc(a, ofp);            status = CPPSTATUS;        }        else if ((char)a == '*')        {            fputc('/', ofp);            status = CSTATUS;        }        else if (a == EOF)        {            fputc(a, ofp);            status = EOFSTATUS;        }        else        {            ungetc(a,ifp);        }    }    else if (a == EOF)    {        fputc(a, ofp);        status = EOFSTATUS;    }}

C状态：

void do_c_status(FILE *ifp, FILE *ofp){    int a = fgetc(ifp);    if (a == '*')    {        int b = fgetc(ifp);        if (b == '/')        {            fputc('\n', ofp);            status = NULLSTATUS;            b = fgetc(ifp);            if (b != '\n')            {                ungetc(b, ifp);;            }        }        else if (b == '\n')        {            fputc(a, ofp);            fputc(b, ofp);            fputc('/', ofp);            fputc('/', ofp);            status = CSTATUS;        }        else if (a == EOF)        {            fputc(a, ofp);            status = EOFSTATUS;        }        else        {            fputc(a, ofp);            ungetc(b, ifp);        }    }    else if(a == '\n')    {        fputc(a, ofp);        fputc('/', ofp);        fputc('/', ofp);    }    else if (a == EOF)    {        fputc(a, ofp);        status = EOFSTATUS;    }    else    {        fputc(a, ofp);    }}

C++状态：

这里写代码片

头文件：

#ifndef __CONVERT_COMMENT_H__#define __CONVERT_COMMENT_H__void convert_main();enum {    NULLSTATUS,    CSTATUS,    CPPSTATUS,    EOFSTATUS,};#endif //__CONVERT_COMMENT_H__

代码实现：

#include <stdio.h>#include "convert_comment.h"int status = NULLSTATUS;void do_cpp_status(FILE *ifp,FILE *ofp){    int a = fgetc(ifp);    fputc(a, ofp);    if (a == '\n')    {        status = NULLSTATUS;    }    else if (a == EOF)    {        status = EOFSTATUS;    }}void do_null_status(FILE *ifp, FILE *ofp){    int a = fgetc(ifp);    fputc(a,ofp);    if ((char)a == '/')    {        a = fgetc(ifp);        if ((char)a == '/')        {            fputc(a, ofp);            status = CPPSTATUS;        }        else if ((char)a == '*')        {            fputc('/', ofp);            status = CSTATUS;        }        else if (a == EOF)        {            fputc(a, ofp);            status = EOFSTATUS;        }        else        {            ungetc(a,ifp);        }    }    else if (a == EOF)    {        fputc(a, ofp);        status = EOFSTATUS;    }}void do_c_status(FILE *ifp, FILE *ofp){    int a = fgetc(ifp);    if (a == '*')    {        int b = fgetc(ifp);        if (b == '/')        {            fputc('\n', ofp);            status = NULLSTATUS;            b = fgetc(ifp);            if (b != '\n')            {                ungetc(b, ifp);;            }        }        else if (b == '\n')        {            fputc(a, ofp);            fputc(b, ofp);            fputc('/', ofp);            fputc('/', ofp);            status = CSTATUS;        }        else if (a == EOF)        {            fputc(a, ofp);            status = EOFSTATUS;        }        else        {            fputc(a, ofp);            ungetc(b, ifp);        }    }    else if(a == '\n')    {        fputc(a, ofp);        fputc('/', ofp);        fputc('/', ofp);    }    else if (a == EOF)    {        fputc(a, ofp);        status = EOFSTATUS;    }    else    {        fputc(a, ofp);    }}void convert_main(){    FILE* ifp;    FILE* ofp;    ifp = fopen("001.c", "r");    ofp = fopen("002.c", "w");    if (ifp==NULL||ofp==NULL)    {        printf("NULL");        return;    }    while (status != EOFSTATUS)    {        switch (status)                                         {        case NULLSTATUS: do_null_status(ifp,ofp);            break;        case CSTATUS: do_c_status(ifp, ofp);            break;        case CPPSTATUS: do_cpp_status(ifp, ofp);            break;        default:             break;        }            }    fclose(ifp);    fclose(ofp);}

主程序：

#include <stdio.h>#include <windows.h>#include "convert_comment.h"int main(){    convert_main();    return 0;}

转换前：

转换后：