Function pointer confusion cleared
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The two examples below will work interchangeably, but for easier remembrance and understanding, stick with one convention
int (*ptr)(int, int) = ∑ s = (*ptr)(1, 2);
OR
int (*ptr)(int, int) = sum; s = ptr(1, 2);
both still work, so choose one convention and stick with it
NB: function pointers contain the address of the code while other pointers contain the address of the value
