Day05自增自减运算符

自增自减运算符

//++      -- 自増,自減 又叫做一元运算符 
int a = 3; 
int b= a++;//行完这行代后,先b賦値,再自増 
//a = a + 1; 
System.out.println(a); 
//a=a +1; 
int c =++a;//行完这行代前,先自増,再b賦値 

System.out.println(a); 
System.out.println(b); 
System.out.println(c); 

//幂运算2^3=2*2*2=8 
double pow = Math.pow(2, 3); 
System.out.println(pow);