Pointer addition and element size

Question

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Answer 1

(I assume that you mean "1" in the last line, not "p")

Pointer arithmetic in both C and C++ is a logical addition, not a numeric addition. Adding one to a pointer means "produce a pointer to the object that comes in memory right after this one," which means that the compiler automatically scales up whatever you're incrementing the pointer with by the size of the object being pointed at. This prevents you from having a pointer into the middle of an object, or a misaligned pointer, or both.