本次程序设计的主要目的是建立一个模拟储蓄账户，以实现账户余额的初始化以及月利息结算账户余额更新；并可同时更改所有账户的年利率数值。-The main purpose of this program is designed to create a simulation savings account in order to achieve the initialization and update account balances monthly interest settlement accou