显示运算数值，第一次输入运算数值显示再按下运算符号的时候清零此时输入第2个运算数值-Numerical calculations show, the first numerical calculations show that the importation of computing symbol and then press zero at this time when the importation of the first two numerical computing

实现汉字串向Unicode ASCII码转换 Unicode 向汉字串的转换-Realized characters to Unicode ASCII code string conversion Character strings to Unicode conversion

提供城市列表，支持首字母，拼音，汉字检索-city list, support the first letter and pinyin and hanzi search.

stm32中在OLED屏上显示汉字 可用于OLED屏显示测试-Stm32 in the OLED screen display Chinese characters