C语言基础算法---从数组中找最大最小值的实际应用

#include "stm32f10x.h"
#include "bsp_usart.h"
#include "bsp_SysTick.h"
#include "bsp_ds18b20.h"
#define NR(x) (sizeof(x)/sizeof(x[0]))
static float find_buffer_max(float buffer_value_max,u32 size,float *buffer);
int main(void)
{ 
 int i = 0;
 float temp_max;
 //设置温度保存的缓存有4个窗值，可以更改 
 float temp_buffer[4] ;
 uint8_t uc, ucDs18b20Id [ 8 ];
 SysTick_Init();
 USART_Config();
 while( DS18B20_Init() ) 
 printf("\r\n no ds18b20 exsit \r\n");
 DS18B20_ReadId ( ucDs18b20Id  );          
 for ( uc = 0; uc < 8; uc ++ )            
  printf ( "%.2x", ucDs18b20Id [ uc ] );
 while(1)
 { 
 //当计数等于测试窗值时，则从4个窗值找温度的最大值 
 if(i == NR(temp_buffer))
 {
 temp_max = find_buffer_max(0.0,NR(temp_buffer),temp_buffer);
 printf"温度的最大值为:%.1f\n",temp_max);
 //清计数器 
 i = 0 ;
 }
 //将当前温度保存到窗值数组
 temp_buffer[i] = DS18B20_GetTemp_MatchRom (ucDs18b20Id); 
 Delay_ms(1000); 
 printf("当前温度值为:%.1f\n",temp_buffer[i]);
 i++ ;
 }  
        return 0 ;
}
//找最大值 
static float find_buffer_max(float buffer_value_max,u32 size,float *buffer)
{
 u8 count = 0 ; 
 float max = buffer_value_max ;
 for(count = 0 ; count < size ; count++)
 {
 if(buffer[count] > max)
 max = buffer[count];
 }
 return max ; 
}