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i am a programming student and i am struggling with a default constructor that is supposed to initialize private variables to 0 and nulls. i am very lost.
your member functions have direct access to variables of that class. in the default constructor, assign any variables as required. you can also make a constructor that takes arguments to assign to the variables.
say you have a class named "foo" with a private variable named "int_var", a default constructor, and a constructor that takes an integer as an argument
// default constructor
int_var = 0;
// constructor that takes an integer
int_var = init_value;
to call the default constructor, instantiate a foo object with no argument. to call the other constructor, pass in an integer.
foo a /* call default constructor */,
b(100); /* call constructor taking an argument */
at least, that how I remember it... I don't use c++ very often.