Cpp generic class and functions,declare in header file and implementation in cpp file seperately

//Util.h
#ifndef _Util_H_
#define _Util_H_
#include <iostream>
#include <random>

using namespace std;

template <class T>
class Util
{
public:
    random_device rd;
    mt19937 mt{rd()};
    Util();
    T getRandom(T min, T max);   
};

#endif


//Util.cpp

#include "Model/Util.h"

template <class T>
Util<T>::Util()
{
    cout << "Constructor!" << endl;
}

template <class T>
T Util<T>::getRandom(T min, T max)
{
    uniform_int_distribution<T> uid(min, max);
    return uid(mt);
}


//main.cpp
#include "Model/Util.h"
#include "Model/Util.cpp"
void showRandom(int x)
{
    Util<uint32_t> ul;
    for(int i=0;i<x;i++)
    {
        uint32_t num=ul.getRandom(0,UINT32_MAX);
        cout<<i<<","<<num<<endl;
    }
}

int main(int args,char **argv)
{
    showRandom(atoi(argv[1]));
}

Compile

g++ -g -std=c++2a -I. *.cpp ./Model/*.cpp -o h1

Run

./h1 100