This code find maximum or largest element present in an array. It also prints the location or index at which maximum element occurs in array. This can also be done by using pointers (see both codes).
Wires are made of metal (almost always copper or aluminum, for electrical wires) because those are the best conductors. The internal components of switches are also made of metal, for the same reason. The outside parts, that you touch and see, are...
Most house wires -- the wires that run from the service panel through walls and to electrical boxes -- are solid-core, meaning they are made of a single, solid strand. Light fixtures and some switches have leads -- wires made of many strands of thin wire, which are more flexible.