Why we use constructor in oops ?

Question

in c++ i can access the member function by creating simple object then why we need to create constructor.

Answer 1

actually constructors are so usefull sometime we need to create some object which require some input without it the operation will not successfully execute.
ex: suppose we are working with graphics then we need a class of Point but with no constructor it is useless,thus must provide a constructor with (int x,int y) values so whenever someone makes an object of this class it will ask for the x & y values.

Answer 2

Great thanks