使用java增量出现问题，增量无法正常工作 [英] Problem in increment with java , increment cannot working

问题描述

以下代码给出输出b = 0;

following code give output b = 0;

int b = 0;
b = b++;
b +=b;
System.out.println("Byte : "+b);

我的尝试：

What I have tried:

b = b++;

为什么b ++指定0不是1

why b++ assign 0 not 1

推荐答案

虽然，这个问题看起来只是一个家庭作业而我们一般都没有回应，但是，这些结果的可能性可以帮助你理解增量的基础知识。

Although, the question looks to be just a homework and to which we do not respond, generally, but, here are the possibilities of such results which may help you understand the basics of increament.

Quote：

int x = 34;

int y = x ++;



x首先分配给y，然后加1。因此，x变为35而y被赋值为34.

int x = 34;
int y = x++;

x is first assigned to y and then incremented by one. Therefore, x becomes 35 while y is assigned with the value 34.

参考：递增和递减运算符 - Java教程 - Java With Us [ ^ ]



现在，当你将增加后的值分配给同一个变量时，只需指定旧的值，即，以下行中的0到b-

Reference: Increment and Decrement Operators - Java Tutorial - Java With Us[^]

Now, when you assign the post-increamented value to the same variable it just assign the old value i.e, 0 to b in the following line-

b = b++; //b=0

所以你得到0作为输出。



将上面的行改为 -

So you are getting 0 as output.

Change the above line to just -

b++; //b=1

尝试以下代码 -

Try following code-

int b = 0;
b++; //changed line
//b +=b; // meaningless as it addsup to itself
System.out.println("Byte : "+b);

希望，我能澄清你的疑问。如果没有，请告诉我:)）

Hope, I was able to clarify your doubt. If not, please let me know :)

这篇关于使用java增量出现问题，增量无法正常工作的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！