英和和英

出典:『Wikipedia』 (2011/06/02 07:19 UTC 版)

英語による解説

引用

A friend function is used in object-oriented programming to allow access to private or protected data in a class from outside the class. Normally a function which is not a member of a class cannot access such information; neither can an external class. Occasionally such access will be advantageous for the programmer; under these circumstances, the function or external class can be declared as a friend of the class using the friend keyword. The function or external class will then have access to all information – public, private, or protected – within the class.