写了个不错的回到字符串子串在母串中出现次数的.

unsigned int CountSubstringTimes(char * subs,char *s)
{
    static unsigned int ls =strlen(subs),
        l =strlen(s);
    static unsigned int time =0;
    if(ls > l)
        return time;
    if(s[0])
    {
        if(subs[0])
        {
            if(subs[0]!=s[0])
                return CountSubstringTimes(subs,s+1);
            else
            {
                return CountSubstringTimes(subs+1,s+1);
            }
        }
        else
        {
            time ++;
            return CountSubstringTimes(subs-ls,s);
        }
    }
    else
    {
        if(!subs[0])
            time++;
        return time;
    }
}


cout<<CountSubstringTimes("do","idoidoidodoidoloveyouanddoyoudoyoudodoyoulovemetoo");