c++ 16机制文本生成问题(标签-windows|关键词-16进制)

Question

windows 10 vs2019 C++
下面代码生成形如“ADBF0000"这样的16机制文本，但我总觉得太过繁琐。那么多变量+语句。
我实际上就是需要随机取一个0-65535的数转16进制，以”0000“结尾,应该一共（4字节？）不知道有其他简单点的？

int  main()
{
    srand((unsigned int)time(NULL));
    unsigned char a[4] = {0};
    a[0]=(unsigned char)rand();
    a[1] = (unsigned char)rand();
    char b[8];
    ByteToHexStr((const unsigned char*)a, b, 4);
    stringstream stream;
    stream << b;
    string bbb = stream.str();
    string str1 = bbb.substr(0, 8);
    std::cout << str1  << std::endl;
}

void ByteToHexStr(const unsigned char* source, char* dest, int sourceLen)
{
    short i;
    unsigned char highByte, lowByte;

    for (i = 0; i < sourceLen; i++)
    {
        highByte = source[i] >> 4;
        lowByte = source[i] & 0x0f;

        highByte += 0x30;

        if (highByte > 0x39)
            dest[i * 2] = highByte + 0x07;
        else
            dest[i * 2] = highByte;

        lowByte += 0x30;
        if (lowByte > 0x39)
            dest[i * 2 + 1] = lowByte + 0x07;
        else
            dest[i * 2 + 1] = lowByte;
    }
    return;
}

Answer 1

那你随机产生一个短整形就行了啊

int  main()
{
    srand((unsigned int)time(NULL));
    unsigned short a = rand();
    char s[9] = {0};
    sprintf(s,"%02X%02X0000",a>>8,a&0xFF);
    cout<<s<<endl;
}