英文:
Heavy number corruption in floating point division in Java?
问题
我一直在尝试使用Java浮点数除法来做一些简单的事情，已经阅读了几篇关于在值上进行一些最小更改的文章，但与我下面遇到的情况完全不同。
这是期望的代码：
float f = 1789773f / 1000000f;
System.out.printf("\n%.2f", f);
// 输出结果: 1.79
这是在使用变量时发生的情况：
int CLOCK = 1789773;
System.out.printf("\n%.2f", (float)CLOCK / (10^6));
// 输出结果: 13410.48
发生了什么？我不得不使用字面量'1000000f'而不是10^6才能使其正常工作。另外，我认为将除法元素之一转换为(float)会将所有内容都设置为浮点数，我不会最终执行整数运算。
英文:
I have been trying to do something simple with java floating point division, have read several articles on some minimal changes on values but nothing like I am having below.
This is the expected:
float f = 1789773f / 1000000f;
System.out.printf("\n%.2f", f);
Outputs: 1,79
This is what happens when I work with variables:
int CLOCK=1789773;
System.out.printf("\n%.2f", (float)CLOCK/(10^6));
Outputs: 13410,48
What is going on? I had to use the literal '1000000f' instead of 10^6 to make it work. Also, I thought that casting the one of the division elements with (float) would set everything as float and I would not end doing integer math.
答案1
得分: 3
10^6 不是一百万。它是12，因为 ^ 是按位异或运算符，而不是指数运算。
使用 1e6f，或者只使用 1000000f。
英文:
10^6 is not a million. It's 12, because ^ is the bitwise xor operator rather than exponentiation.
Use 1e6f, or just 1000000f.
答案2
得分: 1
尝试使用这个代替：
int CLOCK = 1789773;
float fclock = (float) (CLOCK / (Math.pow(10, 6)));
System.out.printf("\n%.2f", fclock);
英文:
Try using this instead :
int CLOCK = 1789773;
float fclock = (float) (CLOCK/(Math.pow(10,6)));
System.out.printf("\n%.2f", fclock);
答案3
得分: 0
float CLOCK = 1789773f;
System.out.printf("\n%.2f", CLOCK / Math.pow(10, 6));
**OR**
int CLOCK = 1789773;
System.out.printf("\n%.2f", (float) (CLOCK / Math.pow(10, 6)));
尝试使用Math.pow(10, 6)，这对我来说运行正常。
英文:
float CLOCK=1789773f;
System.out.printf("\n%.2f", CLOCK/Math.pow(10,6));
OR
int CLOCK=1789773;
System.out.printf("\n%.2f",(float) (CLOCK/Math.pow(10,6)));
Try to use Math.pow(10,6), it's working fine for me.
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