去掉C/C++程序中的注释

还是喜欢这个有限状态机的写法，又简单，又明了！话不多说，自己根据程序画一个状态机自己看吧。

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

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){
        printf("cannnot open the file");
        exit(0);
    }

    FILE *pfout;
    pfout = fopen("result.txt", "w");
    initialize_fsm(fsm);

    while((ch = fgetc(pfin)) != EOF){
        state = fsm[state][ch];
        temp = ch;
        switch(state){
            case 5:
            case 6:
            case 0:
                fputc(ch, pfout);
                break;
            case 7:
                state = 0;
                break;
        }
    }
    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'] = 7;
    fsm[3]['*'] = 4;
    fsm[4]['/'] = 7;
    fsm[5]['\\'] = 6;
    fsm[5]['"'] = 0;
}