CPP
cpp
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#include <iostream>
using namespace std;
class test
{
public:
test(int x) : m_x(x) {}
test& operator+(const test& other)
{
m_x = m_x + other.m_x;
return *this;
}
friend ostream& operator<<(ostream& os,const test& obj);
private:
int m_x;
};
ostream& operator<<(ostream& os,const test& obj)
{
os << obj.m_x;
return os;
}
int main()
{
test obj(2);
test obj2 = 3;//to have this as error. mark constructor as explicit
test obj3(4);
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