Different Kinds of Operator Overloading

What is Operator Overloading?We know that standard data types supplied by languages are well known and there will be operators like +,* ,% operates on these data types. But, what is the case if it is user-defined types say a 3dpoint class, which is the combination of three integers. Well, all languages that supports operator overloading says, “It is your Type. Please you say how the operator +