模块操作中的公开错误

您好，我正在使用一个模块（%）操作，据我所知，有两种方法得到一个数字的模块：*num＝num % 10；*num %＝10；问题是第二种情况没有给出正确的结果。78），我得到不同的输出：*RIFT1（678）＝4857 *RIFT2（678）＝1449，有什么我不明白的吗？或者这是编译器的问题吗？P.D.：我使用的是APIC32 MX575 F512L



      以下为原文

    Hello, I was using a module (%) operation and as far as I know there are two way to get the module of a number:
* num = num % 10;
* num %= 10;
The problem is that the second case doesn't give the correct result.
I'll elavorate.

I have the following functions:

uint16_t invert1( uint32_t input )
{
     uint16_t output;

     output = (uint16_t)(input%10000);
     output ^= 0xFFFF;
     output = output % 10000;
     return output;
}

uint16_t invert2( uint32_t input )
{
     uint16_t output;

     output = (uint16_t)(input%10000);
     output ^= 0xFFFF;
     output %= 10000;
     return output;
}

Under the same input (let's go with input = 678), I get different outputs:
* invert1(678) = 4857
* invert2(678) = 1449

Is there something that I do not understand? Or is this a problem with the compiler?

P.D.: I am using a PIC32MX575F512L