JuniorTheoryCommon

What does the program print (lines separated by spaces)?

Spot a = new Spot();
a.X = 7;
Spot b = new Spot();
b.X = 7;
Console.WriteLine(a == b);
b = a;
Console.WriteLine(a == b);

class Spot { public int X; }

False True

Expecting True True: for a class, == compares references by default, and two objects with equal fields are still two different objects.
Expecting False False: b = a makes b lead to the object a leads to, so the second comparison is between one object and itself.

What would the program print if Spot were a struct and both lines used a.Equals(b)?
Why does == compare the text of two string objects instead of their references?

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JuniorTheoryCommon

What does the program print (lines separated by spaces)?

Spot a = new Spot();
a.X = 7;
Spot b = new Spot();
b.X = 7;
Console.WriteLine(a == b);
b = a;
Console.WriteLine(a == b);

class Spot { public int X; }

False True

Expecting True True: for a class, == compares references by default, and two objects with equal fields are still two different objects.
Expecting False False: b = a makes b lead to the object a leads to, so the second comparison is between one object and itself.

What would the program print if Spot were a struct and both lines used a.Equals(b)?
Why does == compare the text of two string objects instead of their references?

Back to questions Open topic in roadmap →Answer it yourself — Quiz