What is the difference between these 2 ways of declaring a struct?
First way:
struct x {};
Second way:
struct _x {} x;
What is the difference between these 2 ways of declaring a struct? First way:
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What is the difference between these 2 ways of declaring a struct?
First way:
struct x {};
Second way:
struct _x {} x;
The first defines only the type
struct x. The second defines the typestruct _xand defines a variable of that type namedx.Though it’s probably not what you had in mind, names starting with an underscore like
_xare reserved at file scope, so unless this is inside some other scope, the second has undefined behavior.