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>                /* special function register declarations   */
                                  /* for the intended 8051 derivative         */

#include <stdio.h>                /* prototype declarations for I/O functions */
#include<math.h>


#ifdef MONITOR51                         /* Debugging with Monitor-51 needs   */
char code reserve [3] _at_ 0x23;         /* space for serial interrupt if     */
#endif                                   /* Stop Exection with Serial Intr.   */
                                         /* is enabled                        */




void main()
{
    float a,b,c,Deta,Result1,Result2,RealPart,ImagPart;

#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
    while(1)
{	printf("please enter three floats for equation's modulus:\n");
	scanf("%f",&a);
		scanf("%f",&b);

			scanf("%f",&c);

	printf("the equation");
	Deta=b*b-4*a*c;
	if(Deta==0)
	printf("has two equal roots:%f\n",-b/(2*a));
	else if(Deta>0)
	{Result1=(-b+sqrt(Deta))/(2*a);
	Result2=(-b-sqrt(Deta))/(2*a);
	printf("has two unequal real roots:%fand%f\n",Result1,Result2);}
	else
	{RealPart=-b/2*a;
	ImagPart=sqrt(-Deta)/2*a;
	printf("has two complex roots:\n");
	printf("%f+i%f\n",RealPart,ImagPart);
	printf("%f-i%f\n",RealPart,ImagPart);
	}
	}

}