有几个问题：
①用UE打开把一个汉字用十六进制打开，比如：我D2 CE，这个算什么编码？是unicode吗？
②用什么方式验证一个汉字的utf8是否正确？没有字库。
③看看这个程序吧，自己感觉已经对了，但是有人说有问题，没说什么问题，请看看。

谢谢了！是这两天刚刚接触这些编码，有什么贻笑大方的话请见谅。

#include<stdio.h>
#include<string.h>
#include<malloc.h>

#define uint8_t  unsigned _int8
#define uint16_t unsigned _int16 

void printutf8(uint8_t *utf8)
{
    uint8_t *p = utf8;
    while(*p)
    {
        printf("%02X", *p);
        p++;
    }
    printf("\n");
}

void printuni(uint16_t *utf16, int size)
{
    uint8_t *p = (uint8_t *)utf16;
    int i = 0;  

 for (i = 0; i < size; i++)
    {
        printf("%02X", *p);
        p++;
    }
    printf("\n");
} 

void unicode_to_utf8(uint16_t *in, int insize, uint8_t **out)
{
    int i;
    int charscount;
    int outsize=0; 
    uint8_t *result;
    uint8_t *tmp;  
    charscount = insize / sizeof(uint16_t);
    result = (uint8_t *)malloc(charscount * 3 + 1);
    memset(result, 0, charscount * 3 + 1);  //将result中后charscount*3+1个字节,用0替换并返回result
    tmp = result;  
    for (i = 0; i < charscount; i++)
    {
        uint16_t unicode = in[i];  
        if (unicode <= 0x0000007f)
            *tmp = (uint8_t)unicode; 
        else
            if (unicode >= 0x00000080 && unicode <= 0x000007ff)
        {
            *tmp = 0x000000c0 | (unicode >> 6);
            tmp += 1;
            *tmp = 0x00000080 | (unicode & (0x000000ff >> 2));
            tmp += 1;
        }
            else
                if (unicode >= 0x00000800 && unicode <= 0x0000ffff)
                {
                    *tmp = 0x000000e0 | (unicode >> 12);
                    tmp += 1;
                    *tmp = 0x00000080 | (unicode >> 6 & 0x000000ff);
                    tmp += 1;
                    *tmp = 0x00000080 | (unicode & (0x000000ff >> 2));
                    tmp += 1;
                } 
    }
    *out = result; 
} 

void main()
{
    uint16_t unicode[] = {'中'};
    uint8_t *utf8 = NULL;  
    uint16_t *uni = NULL;  

    printf("字符“我”转换为 unicode: \n");
    printuni(unicode, sizeof(unicode));

    printf("再将unicode转换为 utf8: \n");
    unicode_to_utf8(unicode, sizeof(unicode), &utf8);
    printutf8(utf8);   

}