Arduino 问题-NewPing 库可以将变量传递给我的程序循环吗？

Question

我在 Arduino Nano 项目中使用超声波传感器。我正在使用 NewPing.cpp 库文件，特别是 ping_median() 函数，如下所示：

// This is the top of NewPing.cpp:

#include "NewPing.h"
//
// There are other versions of ping routines in here, however this one averages the data samples so this is the one I'm hoping to use.

// ********************* THIS IS THE PART OF THE NEWPING.CPP THAT I WANT TO USE ***********************************
unsigned long NewPing::ping_median(uint8_t it, unsigned int max_cm_distance)
{
  unsigned int uS[it], last;
  uint8_t j, i = 0;
  unsigned long t;
  uS[0] = NO_ECHO;

  if (max_cm_distance > 0) set_max_distance(max_cm_distance); // Call function to set a new max sensor distance.

  while (i < it)
  {
    t = micros();          // Start ping timestamp.
    last = ping();         // Send ping.

    if (last != NO_ECHO)
    { // Ping in range, include as part of median.
      if (i > 0)
      { // Don't start sort till second ping.
        for (j = i; j > 0 && uS[j - 1] < last; j--) // Insertion sort loop.
          uS[j] = uS[j - 1];                      // Shift ping array to correct position for sort insertion.
      } else j = 0;      // First ping is sort starting point.
      uS[j] = last;      // Add last ping to array in sorted position.
      i++;               // Move to next ping.
    }
    else it--;           // Ping out of range, skip and don't include as part of median.

    if (i < it && micros() - t < PING_MEDIAN_DELAY)
      delay((PING_MEDIAN_DELAY + t - micros()) >> 10); // Millisecond delay between pings.
  }

// ************* I added this line ****************************
  iterationCnt = it; // I would like to pass this value into my program loop
// ************************************************************

  return (uS[it >> 1]); // Return the ping distance median.
}
// ********************* END OF THIS IS THE PART THAT I WANT TO USE ***********************************

到目前为止我尝试过的：

1. 我将变量“uint8_t it”从本地转换为全局，方法是将函数重命名为：“unsigned long NewPing::ping_median(it, unsigned int max_cm_distance)”并将“uint8_t it”放在文件顶部。

2. 我将“iterationCnt”声明为 uint8_t 以匹配“it”变量并将其放在 NewPing.cpp 的顶部。

3. 我将 NewPing.cpp 和 NewPing.h 文件移至与我的程序相同的目录中，并将程序顶部的 #include 从“#include ”更改为“#include "NewPing.h"”。

4. 我把所有东西都放回原来的样子...