six_666666的博客

public class VaiableExchange {        public static void main(String[] args) { Scanner scan = new Scanner(System.in); System.out.println("请输入变量A的值"); long A = scan.nextLong(); System.out.println(

public class TypeConversion {        public static void main(String[] args) { byte b = 127; char c = 'W'; short s = 23561; int i = 3333; long l = 400000l; float f = 3.14159f; double d = 54.523