简单且逼格高的运算符 var a = 12; console.log(-a); //输出 -12 - -> 取反 var b = a++; console.log(b); //输出 12 - -> 先赋值b,a再++ b = ++a; console.log(b); //输出 14 - -> ++a赋值b,a先++后赋值 var a = 1; var b = 2; a += b; //相当于 a = a + b console.log(a); //输出 3 a += b + 3; //相
import java.util.Scanner; public class CaculationTest { public static void main(String[] args) { Scanner reader = new Scanner(System.in); double a, b, result = 0; String operator; Operation operation = null; System.out.println("**********************