这个程序要求用户输入当前月份的平均降雨量和过去12个月份的实际降雨量，然后格式化输出过去每个月实际降雨量和当前月平均降雨量的比较。-This program is used to study the rainfall. The user is asked to input the average rainfall of a month, the actural rainfall in the past twelve months. Then display the difference in a