java - 模数未显示正确的值

Question

-46 模 7 是 3，但我得到 -4。为什么？

int sa=-46;
int p=7;
System.out.println(sa);//-46
sa=sa%p;
System.out.println(sa);//-4

编辑:

我是这样解决的

(sa) % p + p) % p;

Answer 1

Java % 的定义(余数运算符)

The Java programming language provides operators that perform addition, subtraction, multiplication, and division. There's a good chance you'll recognize them by their counterparts in basic mathematics. The only symbol that might look new to you is "%", which divides one operand by another and returns the remainder as its result.

(参见引用来源 here )

如果你想创建一个模函数，当你要求模 n 时，它只返回 [0, n) 范围内的数字，你必须编写它(简单)。