ex_2_5_2.java

java思想编程与设计模块

/*
 * 文件名 ex_2_5_2.java
 * 说  明：演示基本算术运算符的使用
 */
class ex_2_5_2 {
	public static void main(String args[]) {
		// 整数算术运算
		System.out.println("整数算术运算");
		int a = 1 + 2 ;
		int b = a * 3;
		int c = b / 4;
		int d = c - a;
		int e = -d;
		System.out.println("a = " + a);
		System.out.println("b = " + b);
		System.out.println("c = " + c);
		System.out.println("d = " + d);
		System.out.println("e = " + e);
		// 双精度浮点数算术运算
		System.out.println("\n双精度浮点数算术运算");
		double da = 1 + 1;
		double db = da * 3;
		double dc = db / 4;
		double dd = dc - a;
		double de = -dd;
		System.out.println("da = " + da);
		System.out.println("db = " + db);
		System.out.println("dc = " + dc);
		System.out.println("dd = " + dd);
		System.out.println("de = " + de);
	}
}