习题8-9 分类统计各类字符个数

 1 void StringCount(char* s)
 2 {
 3     int len = 0;
 4     char* p = s;
 5     int cap_letter = 0;
 6     int sma_letter = 0;
 7     int space = 0;
 8     int digit = 0;
 9     int other = 0;
10 
11     while (*p != '\0')
12     {
13         len++;
14         p++;
15     }
16     for (int i = 0; i < len; i++)
17     {
18         if (s[i] >= 'A' && s[i] <= 'Z')
19         {
20             cap_letter++;
21         }
22         else if (s[i] >= 'a' && s[i] <= 'a')
23         {
24             sma_letter++;
25         }
26         else if (s[i] == ' ')
27         {
28             space++;
29         }
30         else if (s[i] >= '0' && s[i] <= '9')
31         {
32             digit++;
33         }
34         else
35         {
36             other++;
37         }
38     }
39 
40     printf("%d %d %d %d %d\n", cap_letter, sma_letter, space, digit, other);
41 
42 }