[英]What is the alternative for while(0) or while(1) in Java?
I am solving an interview question which is to write a method that does the addition of two digits without using the + operator. 我正在解决一个面试问题,即编写一种无需使用+运算符即可将两位数相加的方法。
I understand the algorithm very well and I can do it easily in C. 我对算法非常了解,可以在C语言中轻松完成。
Here is the algorithm and it works perfectly: 这是算法,它可以完美运行:
int add(int x, int y) {
int a, b;
do {
a = x & y;
b = x ^ y;
x = a << 1;
y = b;
} while (a);
return b;
}
I tried translating this code to Java, but this algorithm functions because a is going to become 000 at one point which in C will equal to False in the while loop. 我尝试将这段代码转换为Java,但是该算法起作用了,因为a将在某一点变为000,而在while循环中C等于False。 What is the alternative for that in Java?
Java的替代方法是什么?
Thanks. 谢谢。
You need to use a boolean for the condition in Java: 您需要为Java中的条件使用布尔值:
while (a != 0)
Edit (full code): 编辑(完整代码):
int add(int x, int y) {
int a, b;
do {
a = x & y;
b = x ^ y;
x = a << 1;
y = b;
} while (a != 0);
return b;
}
Java does not - unlike C - interprete 0
as false
. Java没有-与C不同-将
0
解释为false
。 As stated in my comment you have to use a boolean expression such as: 如我的评论所述,您必须使用布尔表达式,例如:
while (a != 0)
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