cocos2d JS 基础语法运算符

 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;        //相当于 a = a + b + 3
 console.log(a);        //输出 8
 

 a -= b;        //相当于 a = a - b
  console.log(a);        //输出 6
 

  a *= b;        //相当于 a = a * b
  console.log(a);        //输出 12
 

  a /= b;        //相当于 a = a / b
  console.log(a);        //输出 6
 

  a %= b;        //相当于 a = a % b
 console.log(a);        //输出 0

var  score = 80;

var result = score > 60 ? “及格”:“不及格”;

console.log(result);          //输出 及格