なんとAdaは整数除算演算子が無いっぽい！！！！？＞＜；
Ada Programming/All Operators - Wikibooks, open books for an open world https://en.wikibooks.org/wiki/Ada_Programming/All_Operators#Binary_adding_operators
Ada Programming/Delimiters// - Wikibooks, open books for an open world https://en.wikibooks.org/wiki/Ada_Programming/Delimiters//