My Type - nicro, C++ (gcc)

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//My type nicro

#include <iostream>
#include <string>

using namespace std;

template<class T>class nicro{
public:
    nicro(){}
    nicro(const nicro& n): val(n.val){}
    nicro(const T& t) : val(t){}
    ~nicro(){}
    
    nicro& operator =(const nicro& other){
        val = other.val;
        return *this;
    }
    int operator <(const nicro& other)const{
        return val < other.val;
    }
    int operator ==(const nicro& other)const{
        return val == other.val;
    }
    
    friend ostream& operator <<(ostream& out, const nicro& n){
        out << n.val;
        return out;
    }
        
private:
    T val;
     
};

typedef nicro<double>dNicro;
typedef nicro<int>iNicro;

void nicro_func(){
    dNicro dn1;
    dNicro dn2(40.25);
    dNicro dn3(dn2);
    dNicro dn4(255);
    dNicro dn5(2*8);
    
    iNicro in1(4095);
    iNicro in2;
    iNicro in3(in1);
    iNicro in4(65);
    
    dn1 = dn4;
    
    cout << "\ndn2 = " << dn2;
    cout << "\ndn3 = " << dn3;
    cout << "\ndn1 = " << dn1;
    cout << "\ndn4 = " << dn4;
    cout << "\ndn5 = " << dn5;
    
    cout << "\n";    
    
    cout << "\nin1 = " << in1;
    cout << "\nin3 = " << in3;
    
    in2 = in4;
    cout << "\nin4 = " << in4;
    cout << "\nin2 = " << in2;

};

int main()
{
    
    nicro_func();
    
        
    return 0;
}

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Compilation time: 0.38 sec, absolute running time: 0.04 sec, cpu time: 0 sec, memory peak: 3 Mb, absolute service time: 0.42 sec