yiyidangzhi

摘要： 变量 变量类型有： 字符串string str = "fwqd" 字符char cr = 'a' byte a = -127 短整型short a = 2 整型int a = 22 长整型long a = 1289L 单精度浮点数float a = 23.1F 双精度浮点数double a = 12 阅读全文