[项目]注释转换 ——C++注释转换为标准C语言注释

编写注释转化程序，实现对一个C/C++语言程序源文件中注释的转换功能
1.C++风格的注释//注释转换为标准C分风格/* */注释
2./* */风格的注释保持原样
3.所有的转换需要符合语法规则
4.注释转换需要支持注释嵌套
注释转化要求：
注释的嵌套情形很多，这里只是举例，你需要遵照C/C++语言的注释规则来编写代码，我不会仅测试这里的例子。
1、单行注释或没有嵌套，注释行直接转换，如：
①//123 /* 123 */
②/* 123 / / 123 */ 不变
③/*123
*/ 保持原样
2、有嵌套的注释（一个注释中还有嵌套其他注释符号//,/* */）嵌套中多余的每个注释符号用两个空格代替。
如单行：
① //123 /456 / /123 456/
②//123//456 /123 456/
③//123*//456 /*123 456/
如跨行
/…….. /……..
//……… ……….
// …….. ……….
/ /
注意：
1、除以下两种情况的修改，源文件转换后不能有任何其它的修改：
①多余的注释符用空格代替
②//在注释开始替换为/* ,行尾增加*/
2、下面的3种情形无需转换
① /* 123 / / 456 */
②/* 123 / / 456
*/
③/* 123
/ / 456
*/
3、不需要考虑输入文件中不符合语法规则的注释
下面是主函数

#include<iostream>using namespace std;extern int CommentConvert(FILE *inputfile, FILE *outputfile);int main(){    FILE *fpIn = NULL;  //inputfile    FILE *fpOut = NULL; //outputfile    fpIn = fopen("/Users/caolu/Desktop/程序/自己的创作/注释/input.c","r");    if(NULL == fpIn)    {        cout<<"Open input file fail!"<<endl;        return -1;    }    fpOut = fopen("/Users/caolu/Desktop/程序/自己的创作/注释/output.c","w");    if(NULL == fpOut)    {        cout<<"Open output file fail!"<<endl;        return -1;    }    CommentConvert(fpIn,fpOut); //    fclose(fpIn);    fclose(fpOut);    return 0;}

状态函数的实现

#include<iostream>using namespace std;#define UL unsigned longextern int CommentConvert(FILE *inputfile, FILE *outputfile);typedef enum{    NO_COMMENT_STATE,    C_COMMENT_STATE,    CPP_COMMENT_STATE,    STR_STATE,    END_STATE}STATE_ENUM;typedef struct{    FILE *inputfile;    FILE *outputfile;    STATE_ENUM ulstate;}STATE_MACHINE;//STATE_MACHINE g_state = {0};///////////////////////////////////////////////////void EventPro(char ch);void EventProAtNo(char ch);void EventProAtC(char ch);void EventProAtCpp(char ch);void EventProAtStr(char ch);////////////////////////////////////////////////////int CommentConvert(FILE *inputfile, FILE *outputfile){    if(inputfile==NULL || outputfile==NULL)    {        cout<<"input argument Invalid!"<<endl;        return -1;    }    g_state.inputfile = inputfile;    g_state.outputfile = outputfile;    g_state.ulstate = NO_COMMENT_STATE;    char ch;    while(g_state.ulstate != END_STATE)    {        ch = fgetc(g_state.inputfile); //        EventPro(ch);    }    return 0;}void EventPro(char ch){    switch(g_state.ulstate)    {    case NO_COMMENT_STATE:        EventProAtNo(ch);        break;    case C_COMMENT_STATE:        EventProAtC(ch);        break;    case CPP_COMMENT_STATE:        EventProAtCpp(ch);        break;    case STR_STATE:        EventProAtStr(ch);        break;    case END_STATE:        break;    }}void EventProAtNo(char ch){    char nextch;    switch(ch)    {    case '/':   // // /*         nextch = fgetc(g_state.inputfile);        if(nextch == '/') // C++        {            fputc('/',g_state.outputfile);            fputc('*',g_state.outputfile);            g_state.ulstate = CPP_COMMENT_STATE;        }        else if(nextch == '*') //C        {            fputc(ch,g_state.outputfile);            fputc(nextch,g_state.outputfile);            g_state.ulstate = C_COMMENT_STATE;        }        else        {        }        break;    case EOF:        g_state.ulstate = END_STATE;        break;    case '"':        g_state.ulstate = STR_STATE;    default:        fputc(ch,g_state.outputfile);        break;    }}void EventProAtC(char ch){    char nextch;    switch(ch)    {        case '/':            nextch = fgetc(g_state.inputfile);            if(nextch == '/')            {                fputc(' ',g_state.outputfile);                fputc(' ',g_state.outputfile);            }            break;    case '*':        nextch = fgetc(g_state.inputfile);        if(nextch == '/')        {            fputc(ch,g_state.outputfile);            fputc(nextch,g_state.outputfile);            g_state.ulstate = NO_COMMENT_STATE;        }        break;    default:        fputc(ch,g_state.outputfile);        break;    }}void EventProAtCpp(char ch){    //123  /*123    char nextch;    switch(ch)    {    case'/':        nextch =fgetc(g_state.inputfile);        if(nextch == '/')            {                fputc(' ',g_state.outputfile);                fputc(' ',g_state.outputfile);            }          else  if(nextch == '*')            {                fputc(' ',g_state.outputfile);                fputc(' ',g_state.outputfile);            }            else                fputc(ch,g_state.outputfile);            break;    case'*':        nextch =fgetc(g_state.inputfile);        if(nextch == '/')        {            fputc(' ',g_state.outputfile);            fputc(' ',g_state.outputfile);        }        else            fputc(ch,g_state.outputfile);        break;    case '\n':        fputc('*',g_state.outputfile);        fputc('/',g_state.outputfile);        fputc('\n',g_state.outputfile);        g_state.ulstate = NO_COMMENT_STATE;        break;    case EOF:        fputc('*',g_state.outputfile);        fputc('/',g_state.outputfile);        g_state.ulstate = END_STATE;        break;    default:        fputc(ch,g_state.outputfile);        break;    }}void EventProAtStr(char ch){    char nextch;    switch(ch)    {        case'\0':            fgetc(g_state.inputfile);            if(nextch == '"')                 g_state.ulstate = NO_COMMENT_STATE;            break;        case EOF:            g_state.ulstate = END_STATE;            break;        default:            fputc(ch,g_state.outputfile);            break;    }}

input.c

//每个区由若干个内存块组成//trte//dfgd//aaaaa*///*//*dfnmhj;//  /**/xfhg;/*dfg*//**//*jjjjjj//*/int j = 0;/*//ggg//gg//gg*//**//**/qqqqqqqqq/*mmmmmm*//*kkkkkkkk              */////////////////////////////////////////////////// 2"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"//aaaaaaaa  "aaaaa//     /*   */     ""aaaaaaaaaaaaaa//    /*     */    "

output.c

/*每个区由若干个内存块组成*//*trte  dfgd*//*aaaaa  *//*    dfnmhj;*//*      xfhg;*//*dfg*//**//*jjjjjj  */int j = 0;/*  ggg  gg  gg*//**//**/qqqqqqqqq/*mmmmmm*//*kkkkkkkk              *//*                                                 2*/"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"//aaaaaaaa  "aaaaa//     /*   */     ""aaaaaaaaaaaaaa//    /*     */    "