text1.c

一次拟合算法,AD转换后的预处理算法,串口,定时器,积分,排序,三角形,延时,一元二次方程.

#include <reg52.h>
#include <stdio.h>
#include <math.h>

#define uint unsigned int
#define uchar unsigned char

float integrate1(uint a ,uint b,uint a2,uint a1,uint a0,uchar m);


void main(void){
  uint a2, a1, a0,a,b;
  float result;
  uchar m;

  /*------------------------------------------------
Setup the serial port for 1200 baud at 16MHz.
------------------------------------------------*/
#ifndef MONITOR51
    SCON  = 0x50;		        /* SCON: mode 1, 8-bit UART, enable rcvr      */
    TMOD |= 0x20;               /* TMOD: timer 1, mode 2, 8-bit reload        */
    TH1   = 221;                /* TH1:  reload value for 1200 baud @ 16MHz   */
    TR1   = 1;                  /* TR1:  timer 1 run                          */
    TI    = 1;                  /* TI:   set TI to send first char of UART    */
#endif

//------------------------------------------------
  printf ("Please enter tree unsigned int data\n");
  scanf ("%u %u %u", &a2, &a1, &a0);
  printf ("f(x)=%dx^2+%dx+%d\n", a2,a1,a0);

  printf ("Please enter a unsigned char data\n");
  scanf ("%bu", &m);

  printf ("Please enter two unsigned int data\n");
  scanf ("%u %u", &a, &b);

  result=integrate1(a ,b,a2,a1,a0,m);
  printf ("The result=%f\n",result);  
  
 
 
 }


//矩形法求积分//
float integrate1(uint a ,uint b,uint a2,uint a1,uint a0,uchar m)
{  	
	 uchar i;
 	 float x=0,dx=0,xi=a,sum;
  	 dx=(float)(b-a)/(float)m;
  	 for(i=0;i<m;i++){
	   xi=a+i*dx;
  	   sum=sum+(a2*xi*xi+a1*xi+a0)*dx;
	   }
	   return sum;
}