C++语言 将二进制数据按行读取转换成字节数组

    unsigned long j = 0;
    int count = 0;
    char Hex[3];
    unsigned char swapHex[8]，*buffer = NULL;

    while (getline(input, line)) {
        for (int i = 0; i < line.length() / 8; i++) {
            string sub = line.substr(i * 8, 8);
            bitset<8> set(sub);
            sprintf(Hex, "%02X", set.to_ulong());
            long val = strtol(Hex, NULL, 16);
            swapHex[count] = (unsigned char)val;
            count++;
            if(count == 8) {
                for(count = 7; count >= 0; count--) {
                    buffer[j] = swapHex[count];
                    j++;
                }
                count = 0;
            }
        }
    }