在al循环中找到计数器 [英] Finding the counter in al loop

问题描述

我在循环中有这个功能，所以我想计算转换次数。
来自exaplpe的
，当zero_cross从1移动到0时，它应该计数，当它从0移动时它也应该算一数。



我尝试过的事情：

i have this function in side a loop , so i want to count number of transmation .
from exaplpe , when zero_cross move form 1 to 0 , it shlould count , and when it moves from 0 to 1 it should count too.

What I have tried:

int Zero_Cross;

if(BackFromPowerLoss > 20)
{
Zero_Cross =0 ;
}
else
{
Zero_Cross = 1 ;
}

}

推荐答案

一个简单的方法是有两个额外的变量，一个用于跟踪从0到1的交叉，另一个用于跟踪从1到0的交叉点。您需要考虑的是，您只想在Zero_Cross更改时增加这些值。例如：

A simple way to do this is to have two extra variables, one to track the crossing from 0 to 1 and the other to track the crossing from 1 to 0. The thing you will need to take into consideration is that you only want to increment these values when Zero_Cross changes. As an example:

int oneToZero;
int zeroToOne;
int Zero_Cross;
if (BackFromPowerLoss > 20)
{
  if (Zero_Cross == 1)
  {
    oneToZero++;
  }
  Zero_Cross = 0;
}

您应该可以从该代码段中填写其余部分。关键是你需要在更改之前检查Zero_Cross的先前值是什么。

You should be able to fill the rest in from that snippet. The key thing is that you need to check what the previous value of Zero_Cross is before you change it.

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