注释转换

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//convert.h#ifndef __CONVERT_H__#define __CONVERT_H__#include<stdio.h>#include<stdlib.h>#define INPUTFILENAME "input.c"  #define OUTPUTFILENAME "output.c"typedef enum CONVERT_START{    NUL_START,    C_START,    CPP_START,    EOF_START}StateType;void CommentConver();void ConvertWork(FILE *r, FILE *w);  void DoCState(FILE *r, FILE *w);void DoNullState(FILE *r, FILE *w);  void DoCppState(FILE *r, FILE *w);#endif

//main.c#define _CRT_SECURE_NO_WARNINGS 1#include<stdio.h>#include"convert.h"StateType state;void do_NUL_State(FILE *r, FILE *w){    int f = fgetc(r);    int s;    switch (f)    {    case '/':        s = fgetc(r);        if (s == '*')        {            fputc('/', w);            fputc('/', w);            state = C_START;        }        else if(s == '/')        {            fputc('/', w);            fputc('/', w);            state = CPP_START;        }        else        {            ungetc(f, w);            ungetc(s, w);        }        break;    case EOF:        fputc(f, w);        state = EOF_START;        break;    default:        fputc(f, w);        break;    }}void do_C_State(FILE *r, FILE *w){    int f = fgetc(r);    int s = 0;    switch (f)    {    case'*':        s = fgetc(r);        if (s == '/')        {            int t = fgetc(r);            state = NUL_START;            if (t != '\n')            {                fputc('\n', w);                ungetc(t, r);            }            else            {                fputc(t, w);            }        }        else        {            fputc(f, w);            ungetc(s, r);        }        break;    case '\n':        fputc(f, w);        fputc('/', w);        fputc('/', w);        break;    case EOF:           fputc(f, w);        state = EOF_START;        break;    default:        fputc(f, w);        break;    }}void do_CPP_State(FILE *r, FILE *w) {    int f = fgetc(r);    switch (f)    {    case'\n':        fputc(f, w);        state = NUL_START;        break;    case EOF:        fputc(f, w);        state = EOF_START;        break;    default:        fputc(f, w);        break;    }}void ConvertWork(FILE *r, FILE *w){    state = NUL_START;    while (state != EOF_START)    {        switch (state)        {        case NUL_START:            do_NUL_State(r, w);            break;        case C_START:            do_C_State(r, w);            break;        case CPP_START:            do_CPP_State(r, w);            break;        default:            break;        }    }}void CommentConvert(){    FILE *pw = NULL;    FILE *pr = fopen(INPUTFILENAME, "r");    if (pr == NULL)    {        perror("open file for read");        exit(EXIT_FAILURE);    }    pw = fopen(OUTPUTFILENAME, "w");    if (pw == NULL)    {        fclose(pr);        perror("open file for write");        exit(EXIT_FAILURE);    }    ConvertWork(pr, pw);    fclose(pr);    fclose(pw);}

//test.c#define _CRT_SECURE_NO_WARNINGS 1#include<stdio.h>#include<windows.h>#include"convert.h"void test(){    CommentConvert();}int main(){    test();    system("pause");    return 0;}

测试用例：

// this is maomaochong/* int i = 0; *//* int j = 10 */int k = 3;int n = 20;/*int i = 0;int j = 20;int k = 250;*/int q = 9527;/***//* int z = 7748258; */ /*int b=94250;*/// /*dsklfjdasl;fdsf;ldsfds*/

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