<OFFER05> 05_ReplaceSpaces

清風oo發表於2018-11-04
 1 void ReplaceBlank(char str[], int length) // length >= the real length of string
 2 {
 3     if (str == nullptr || length <= 0)
 4     {
 5         return;
 6     }
 7     int origin_str_len = 0;
 8     int new_str_len = 0;
 9     int i = 0;
10     int count_space = 0;
11     while (str[i] != '\0')
12     {
13         if (str[i] == ' ')
14             ++count_space;
15         ++origin_str_len;
16         ++i;
17 
18     }
19     new_str_len = origin_str_len + 2 * count_space;
20     if (new_str_len > length)
21         return;
22 
23     while (origin_str_len >= 0 && new_str_len > origin_str_len)
24     {
25         if (str[origin_str_len] == ' ')
26         {
27             str[new_str_len--] = '0';
28             str[new_str_len--] = '2';
29             str[new_str_len--] = '%';
30 
31         }
32         else
33         {
34             str[new_str_len--] == str[origin_str_len];
35         }
36         --origin_str_len;
37     }
38 
39 }