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Say I have a struct that looks like this (a POD):
struct Foo
{
int i;
double d;
};
What are the differences between the following two lines:
Foo* f1 = new Foo;
Foo* f2 = new Foo();
The first one leaves the values uninitialised; the second initialises them to zero. This is only the case for POD types, which have no constructors.