这个运算符是什么意思？ / =

Question

I have just come across some code with the line: 我刚刚遇到了一些代码：

n /= 10;

I assumed it was a typo and removed the / to make it n = 10 , but the program no longer works. 我认为这是一个错字，并删除了/使其变为n = 10 ，但是该程序不再起作用。

Never seen this sort of operator before, anybody know? 有人以前从未见过这种操作员吗？

Answer 1

The /= is a shorthand operator. /=是简写运算符。

a /= b

is equivalent to 相当于

c = a/b;
a = c;

Answer 2

n /= 10 is taking the value of n , dividing it by 10 and reassigning that value to n . n /= 10将n的值除以10然后将该值重新分配给n 。

It's just shorthand for n = (n / 10) just like n++ is n = n + 1 . 它只是n = (n / 10)简写，就像n++是n = n + 1 。

Answer 3

It is the same as 与...相同

n = n/10 ;

You can use this form also with other operators (+, -, %,...). 您也可以将其与其他运算符（+，-，％，...）一起使用。

The case n+=1 (n-=1) can also be written as n++ (increase n by 1) or ++n . n + = 1（n- = 1）的情况也可以写成n++ （将n增加1）或++n 。

Answer 4

The /= is one of the shorthand operators. /=是速记运算符之一。

A shorthand operator is a concise way to express something that is already available in a programming language. 速记运算符是表达某种已在编程语言中提供的内容的简洁方法。

They are: 他们是：

+= (Eg: x += 4; is equivalent to x = x + 4; ) += （例如： x += 4;等效于x = x + 4; ）
-= (Eg: x -= 4; is equivalent to x = x - 4; ) -= （例如： x -= 4;等效于x = x - 4; ）
*= (Eg: x *= 4; is equivalent to x = x * 4; ) *= （例如： x *= 4;等效于x = x * 4; ）
/= (Eg: x *= 4; is equivalent to x = x / 4; ) /= （例如： x *= 4;等于x = x / 4; ）
%= (Eg: x %= 4; is equivalent to x = x % 4; ) %= （例如： x %= 4;等于x = x % 4; ）

Answer 5

It simply means n = n/10 . 它只是意味着n = n/10 。 The same form can be used with other operators too. 同样的形式也可以与其他运算符一起使用。