The Sales item class offers a good example of member and nonmember binary operators .
中给出了成员和非成员二元操作符的良好例子。
It defines one member operator and has three nonmember operators.
它定义了一个成员操作符，并且有三个非成员操作符。
Symmetric operators, such as the arithmetic, equality, relational, and bitwise operators, are best defined as ordinary nonmember functions.
对称的操作符，如算术操作符、相等操作符、关系操作符和位操作符，最好定义为普通非成员函数。
Symmetric operators, such as the arithmetic, equality, relational, and bitwise operators, are best defined as ordinary nonmember functions.
对称的操作符，如算术操作符、相等操作符、关系操作符和位操作符，最好定义为普通非成员函数。
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