删除注释内容代码及其说明

#include <stdio.h>
#include <string.h>
#include<stdlib.h>

#define SCREEN

void initialize_fsm(char fsm[7][256]);

int main()
{
    int ch , temp = 0 ;
    int state = 0;
    char fsm[7][256];

    FILE *pfin ;
    if ((pfin = fopen("sweep-comments.txt","r")) == NULL)
//为r，则只能读，而不可写
    {
        printf("can not open the file");
        exit(0);
    }
[color=red]//以#开头大代码行是预处理指令
[color=orange]//#include包含一个源代码文件
//#define 定义宏
//#undef 取消定义宏
//#if 如果给定条件为真，则编译下面代码
//#ifdef 如果宏已经定义，则编译下面代码
//#ifndef 如果宏没有定义，则编译下面代码
//#elif 如果前面给定的#if不为真，当前条件为真，则编译下面代码
//#endif 结束一个#if…#else条件编译块
//#error 停止编译并显示错误信息
    #ifndef SCREEN
        #define OUT stdout
//stdout黑框的输出
    #else
        FILE *pfout;
        pfout = fopen("result.txt","w");
//w说明可以读和写
        #define OUT pfout
//pfout文件的输出
    #endif

    initialize_fsm(fsm);

    #pragma region FSM
    while ((ch = fgetc(pfin)) != EOF)
    {
        state = fsm[state][ch];

        if ( state != 2  && ch !='*' && temp == '/')
            fputc(temp,OUT);

        temp = ch;

        switch(state)
        {
            /**//*0,5,6??????"???×÷*/
            case 5:
            case 6:
            case 0:
                    fputc(ch,OUT);
                    break;
            case 7:
                    state = 0;
                    break;
        }

        if(state != 1)
            temp=0;
    }
    #pragma endregion
return 0;
}

void initialize_fsm(char fsm[7][256])
{
    int lenth = sizeof(char)*256;

    memset(fsm[0],0,lenth);
    memset(fsm[1],0,lenth);
    memset(fsm[2],2,lenth);
    memset(fsm[3],3,lenth);
    memset(fsm[4],3,lenth);
    memset(fsm[5],5,lenth);
    memset(fsm[6],5,lenth);

    fsm[0]['"'] = 5;
    fsm[0]['/'] = 1;
    fsm[1]['/'] = 2;
    fsm[1]['*'] = 3;
    fsm[2]['\n'] = 0;
    fsm[3]['*'] = 4;
    fsm[4]['/'] = 7;
    fsm[5]['\\'] = 6;
    fsm[5]['"'] = 0;
}