运算符

class TestAri{

 public static void main(String []args){
           //除：
             int i = 12;
             int j = i/5;     //j=2
             double d = i/5;  //d=2.0
             double d2 = (double)i/5;  //d2=2.4
             double d3 = i/5.0;  //d3=2.4  

          System.out.println(j);
           //取模：%取余数   ，结果的符号取决于被模数 也就是前面的那个数
            int i1 = 12%5; //2

            int i1 = -12%5; //-2

            int i1 = 12%（-5）; //2

            int i1 = -12%（-5）; //-2  
        
           //前++： 先自增1，后做运算

           //后++： 先做运算，后自增1
           
           int myInt1=10;  
           int myInt2=myInt1++;//后++
           System.out.println(myInt1);11
           System.out.println(myInt2);10

           int myInt3=10;
           int myInt4=++myInt3; //前++
           System.out.println(myInt3);//11
           System.out.println(myInt4);//11

     }

}