memcmp() function in C++

memcmp() is a C++ function that compares a specified number of characters in two pointer objects.

It Compares the first number of bytes in the memory block pointed to by "pointer1" with the first number of bytes pointed to by "pointer2", returning zero if both match or a non-zero value if they do not.

This built-in function compares the first byte of buf1 and buf2. The memcmp function compares the first n bytes of s1 and s2 as unsigned character arrays. If all n bytes are equal, the return value...