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。
View Code

1 #include <stdio.h>
 2 #include <string.h>
 3 #include <cstdlib>
 4 
 5 void initialize_fsm(char fsm[7][256]);
 6 
 7 int main()
 8 {
 9     int ch, temp = 0;
10     int state = 0;
11     char fsm[7][256];
12 
13     FILE *pfin;
14     if((pfin = fopen("sweep-comments.txt", "r")) == NULL){
15         printf("cannnot open the file");
16         exit(0);
17     }
18 
19     FILE *pfout;
20     pfout = fopen("result.txt", "w");
21     initialize_fsm(fsm);
22 
23     while((ch = fgetc(pfin)) != EOF){
24         state = fsm[state][ch];
25         temp = ch;
26         switch(state){
27             case 5:
28             case 6:
29             case 0:
30                 fputc(ch, pfout);
31                 break;
32             case 7:
33                 state = 0;
34                 break;
35         }
36     }
37     return 0;
38 }
39 void initialize_fsm(char fsm[7][256])
40 {
41     int lenth = sizeof(char) * 256;
42     memset(fsm[0], 0, lenth);
43     memset(fsm[1], 0, lenth);
44     memset(fsm[2], 2, lenth);
45     memset(fsm[3], 3, lenth);
46     memset(fsm[4], 3, lenth);
47     memset(fsm[5], 5, lenth);
48     memset(fsm[6], 5, lenth);
49 
50     fsm[0]['"'] = 5;
51     fsm[0]['/'] = 1;
52     fsm[1]['/'] = 2;
53     fsm[1]['*'] = 3;
54     fsm[2]['n'] = 7;
55     fsm[3]['*'] = 4;
56     fsm[4]['/'] = 7;
57     fsm[5]['\'] = 6;
58     fsm[5]['"'] = 0;
59 }

原文链接: https://www.cnblogs.com/hengli/archive/2012/09/12/2681827.html

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