在C++11之前，函數(shù)的調(diào)用是通過函數(shù)名來調(diào)用的全闷，函數(shù)名可以理解為存儲(chǔ)函數(shù)指針的變量筷狼。程序順序執(zhí)行函數(shù)名注盈，會(huì)call函數(shù)名存儲(chǔ)的函數(shù)指針混巧，...