C++: Extracting individual digits from a float for LCD1602 number display, 从浮点数提取每一位的数字的函数实现，用于LCD1602显示，STM, Arduino，#c #LCD1602 #c++

gistfile1.txt

#include "math.h"
int getDigits(float d, int digits)
{
int tempint = (int)(d / pow(10.0, digits - 1));
return (tempint % 10);
}


        PM25Data[0] = (PM25data/10000)%10 + 0x30;
        PM25Data[1] = (PM25data/1000)%10 + 0x30;
        PM25Data[2] = (PM25data/100)%10 + 0x30;
        PM25Data[3] = (PM25data/10)%10 + 0x30;
        PM25Data[4] = 0x2E;
        PM25Data[5] = PM25data%10 + 0x30;
        PM25Data[6] = '\0';
        if(PM25Data[0] == 0x30)
        {
          PM25Data[0] = 0x20; //替换为空格显示
          if(PM25Data[1] == 0x30)
          {
            PM25Data[1] = 0x20;
            if(PM25Data[2] == 0x30)
            {
              PM25Data[2] = 0x20;
              if(PM25Data[3] == 0x30)
              {
                PM25Data[3] = 0x20;
              }
            }
          }
        }