a++ 和++a的区别
int a =12;
int b=24;
int c = --a;
System.out.println(c); //11
System.out.println(a); //11
c = b--;
System.out.println(c); //24
System.out.println(b); //23
点击打开链接int c = --a;
System.out.println(c); //11
System.out.println(a); //11
c = b--;
System.out.println(c); //24
System.out.println(b); //23
点击打开链接