井底点灯深烛伊，共郎长行莫围棋。
What we call "failure" is not falling down, but the staying down.
所谓"失败"不是跌倒，而是就此躺平。
数据类型转换分为自动转换和强制转换。自动转换是\
[En]
Data type conversion is divided into automatic conversion and forced conversion. Automatic conversion is a
从低到高执行自动转换。不同类型数据之间的优先级关系如下：
[En]
Automatic conversion is performed from low to high. The priority relationship between different types of data is as follows:
低--------------------------------------------->高
byte,short,char-> int -> long -> float -> double
在操作中，首先将不同类型的数据转换为相同类型，然后执行操作。转换规则如下：
[En]
In the operation, different types of data are first converted to the same type, and then the operation is performed. The conversion rules are as follows:
操作数1类型 操作数2类型 转换后的类型
byte、short、char int int byte、short、char、int long long byte、short、char、int、long float float byte、short、char、int、long、float double double