java 運算子++的練習

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    第一個練習:

public class Demo1{    public static void main (String []args ){    int a = 10;    int b = 10;    int c = 10;    a = b++;   //a = 10,b = 11    c = --a;   //a = 9 ,c = 9    b = ++a;   //a = 10,b = 10    a = c--;   //a = 9 ,c = 8    System.out.println("a="+a+",b="+b+",c="+c);                }}

第二個練習:

public class Demo1{    public static void main (String []args ){    int x = 4;          // 4     6     10    int y =(x++)+(++x)+(x*10);    System.out.println("x="+x+",y="+y);    //輸出x = 6    y = 60                 }}

第三個練習:

public class Demo1{    public static void main (String []args ){    byte b = 10;    b++;         //b = (byte)(b+1)    b = b + 1;   //會報錯    //當byte與int進行混合運算的時候,    會提升int類型,    兩個int相加的結果還是int,    賦值給byte會損失精度                }}

 

java 運算子++的練習