help me c++ class

Question

i need to understand this..help me
class Example{
public :
int x;
Example(int y){x = y;}
}

then in main method,what does this two means?

Example a(3);
Example b = 3;

i see that example b worked..
why there is no error,cause i want to assign b( Example type) to an int..?
are a and b same?

Answer 1

The compiler can use non-explicit constructors as converting constructors, which specify an implicit conversion from the types of their arguments (a single integer in this case) to the class type (Example in this case). Those constructors are not only considered during direct initialization, such as Example a, but also in copy initialization, like with Example b.
More on the explicit keyword:

https://en.cppreference.com/w/cpp/language/explicit

Answer 2

ok..i got it now.tq so much