package cn.neusoft.practice; import java.util.Scanner; public class DateType { public static void main(String[] args){ /** * 第一次课堂练习 P26(1) * 定义变量名a,b,c,d,e,数据类型分别是 int,Boolean,float,double,char,赋值并且输出 * * int a = 10; boolean b = true; float c = 3.1456f; double d = 3.1415926; char e = 'a'; System.out.println("a = "+ a); System.out.println(b); System.out.println(c); System.out.println(d); System.out.println(e); // int f = (int)(Math.random() * 100) ; System.out.println(f); */
/** * P27 如何产生随机的整数范围在10--90之间,包含10和90 * * int a = (int)(10 + Math.random() * 10 + 1); System.out.println(a); */
/** * 课堂练习 *1、输入一个圆柱体的高和半径,求体积 *底面积(πr平方)*高 *
Scanner sc = new Scanner(System.in); System.out.print("请输入圆柱体的高:"); double high = sc.nextDouble(); System.out.print("请输入圆柱体的半径:"); double r = sc.nextDouble(); double volume = 3.14 * r * r * high; System.out.print("圆柱体的体积:"); System.out.println(String.format("%.2f",volume)); */
/** *2、从键盘输入一个摄氏温度C,计算华氏温度F并且输出(F = (9/5)* C + 32 ) * **/ Scanner sc = new Scanner(System.in); System.out.print("请输入摄氏温度:"); double x = sc.nextDouble(); double huashi = (9 / 5 ) * x + 32; System.out.println("华氏温度为:"+huashi+"华氏度");
} }
}
