public static Operation creatOperate(string operate) { Operation oper = null; switch (operate) { case "+": { oper = new OpertionAdd(); break; } case "-": { oper = new OpertionSub(); break; } case "*": { oper = new OpertionMul(); break; } case "/": { oper = new OpertionDiv(); break; } } return oper; }
public static Operation creatOperate(string operate) { Operation oper = null; switch (operate) { case "+": { oper = new OpertionAdd(); break; } case "-": { oper = new OpertionSub(); break; } case "*": { oper = new OpertionMul(); break; } case "/": { oper = new OpertionDiv(); break; } } return(oper); }