C++ 字符串操作常见函数

 1 //字符串拷贝,排除指定字符
 2 char *strcpy_exclude_char(char *dst, const int dst_len, const char *src, const char *exclude_list)
 3 {
 4     int i = 0, j = 0, flag = 0;
 5     const char *p = NULL;
 6     if (dst == NULL && src == NULL)return NULL;
 7     if (dst == src)return dst;
 8     for (; j < dst_len && src[i] != ''; ++i)
 9     {
10         flag = 0;
11         p = exclude_list;
12         while (p && *p != '')
13         {
14             if (*p == src[i]){ flag = 1; break; }
15             p++;
16         }
17         if (flag == 0)dst[j++] = src[i];
18     }
19     dst[j] = '';
20     return dst;
21 }

 1 //字符串拷贝,替换指定字符
 2 char *strcpy_replace_char(char *dst, const int dst_len, const char *src, char aim, char rep)
 3 {
 4     int i = 0;
 5     if (dst == NULL && src == NULL)return NULL;
 6     if (dst == src)return dst;
 7     for (; i < dst_len  && src[i] != ''; ++i)
 8     {
 9         if (src[i] == aim)
10         {
11             dst[i] = rep;
12         }
13         else
14         {
15             dst[i] = src[i];
16         }
17     }
18     dst[i] = '';
19     return dst;
20 }

//字符串原址替换指定字符
char * str_replace_char(char *dst, char aim, char rep)
{
    int i = 0;
    if (dst == NULL)return NULL;
    for (; dst[i] != '';++i)
    {
        if (dst[i] == aim)
        {
            dst[i] = rep;
        }
    }
    return dst;
}