字符串传换成16进制数组

[xingat110]

怎么吧一个字符串转换成16进制
比如吧一个“2ad5f6e5”转换成16进制保存到unsigned char hex[4]中

[ccrun.com]

char sz[] = "2ad5f6e5";
unsigned char hex[4];

size_t len = strlen(sz);

size_t j = 0;
BYTE c;
for (size_t i = 0; i < len; i += 2)
{
    c = sz[i];
    if (c >= '0' && c <= '9') hex[j] = (c - '0') << 4;
    else if (c >= 'a' && c <= 'f') hex[j] = (c - 'a' + 10) << 4;

    c = sz[i + 1];
    if (c >= '0' && c <= '9') hex[j++] |= (c - '0');
    else if (c >= 'a' && c <= 'f') hex[j++] |= (c - 'a' + 10);
}

[缘中人]

转16 2 还都不一样，这几天咋这么多

[xingat110]

引用 1 楼 ccrun 的回复:

char sz[] = "2ad5f6e5";
unsigned char hex[4];

size_t len = strlen(sz);

size_t j = 0;
BYTE c;
for (size_t i = 0; i < len; i += 2)
{
    c = sz[i];
    if (c >= '0' && c <= '9') hex[j] = (c - '0') << 4;
    else if (c >= 'a' && c <= 'f') hex[j] = (c - 'a' + 10) << 4;

    c = sz[i + 1];
    if (c >= '0' && c <= '9') hex[j++] |= (c - '0');
    else if (c >= 'a' && c <= 'f') hex[j++] |= (c - 'a' + 10);
}

懂了，3Q！