[C++]_[获取Utf8字符串的字符个数和子字符串]

static int GetUtf8LetterNumber(const char *s)
{
int i = 0, j = 0;
while (s[i])
{
if ((s[i] & 0xc0) != 0x80) j++;
i++;
}
return j;
}

static int GetUtf8Word(const char *s,int wantedNum,int& offset)
{
int i = 0, j = 0;

int readedNum = 0;
int isReach = 0;
while (s[i])
{
if ((s[i] & 0xc0) != 0x80)
{
if(isReach)
{
break;
}
++j;
readedNum = j;
if(j == wantedNum)
{
isReach = 1;
}

}
++i;
}
offset = i;
return readedNum;
}