习题8-9 分类统计各类字符个数

void StringCount(char* s)
{
    int len = 0;
    char* p = s;
    int cap_letter = 0;
    int sma_letter = 0;
    int space = 0;
    int digit = 0;
    int other = 0;

    while (*p != '')
    {
        len++;
        p++;
    }
    for (int i = 0; i < len; i++)
    {
        if (s[i] >= 'A' && s[i] <= 'Z')
        {
            cap_letter++;
        }
        else if (s[i] >= 'a' && s[i] <= 'a')
        {
            sma_letter++;
        }
        else if (s[i] == ' ')
        {
            space++;
        }
        else if (s[i] >= '0' && s[i] <= '9')
        {
            digit++;
        }
        else
        {
            other++;
        }
    }

    printf("%d %d %d %d %d
", cap_letter, sma_letter, space, digit, other);

}