ex15.lst

《8051系列单片机C程序设计完全手册》的光盘中的所有源代码

C51 COMPILER V6.02  EX15                                                                   09/15/2002 22:22:16 PAGE 1   


C51 COMPILER V6.02, COMPILATION OF MODULE EX15
OBJECT MODULE PLACED IN .\ex15.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE .\ex15.c DEBUG OBJECTEXTEND

stmt level    source

   1          #include <REG52.H>                /* special function register declarations   */
   2                                            /* for the intended 8051 derivative         */
   3          
   4          #include <stdio.h>                /* prototype declarations for I/O functions */
   5          #include <math.h>
   6          
   7          #ifdef MONITOR51                         /* Debugging with Monitor-51 needs   */
              char code reserve [3] _at_ 0x23;         /* space for serial interrupt if     */
              #endif                                   /* Stop Exection with Serial Intr.   */
  10                                                   /* is enabled                        */
  11          
  12          
  13          /*------------------------------------------------
  14          The main C function.  Program execution starts
  15          here after stack initialization.
  16          ------------------------------------------------*/
  17          void main (void) {
  18   1      
  19   1      	float a,b,c,s,x1,x2;
  20   1      	double t; 
  21   1      /*------------------------------------------------
  22   1      Setup the serial port for 1200 baud at 16MHz.
  23   1      ------------------------------------------------*/
  24   1      #ifndef MONITOR51
  25   1          SCON  = 0x50;		        /* SCON: mode 1, 8-bit UART, enable rcvr      */
  26   1          TMOD |= 0x20;               /* TMOD: timer 1, mode 2, 8-bit reload        */
  27   1          TH1   = 221;                /* TH1:  reload value for 1200 baud @ 16MHz   */
  28   1          TR1   = 1;                  /* TR1:  timer 1 run                          */
  29   1          TI    = 1;                  /* TI:   set TI to send first char of UART    */
  30   1      #endif
  31   1      /*------------------------------------------------
  32   1      Note that an embedded program never exits (because
  33   1      there is no operating system to return to).  It
  34   1      must loop and execute forever.
  35   1      ------------------------------------------------*/
  36   1      	printf(" please input a,b,c:");
  37   1      	scanf("%f %f %f ",&a,&b,&c) ;
  38   1      	if(a==0.0)
  39   1      		if(b!=0.0)
  40   1      			printf("the root is :%f\n",-c/b);
  41   1      		else if(c==0.0)
  42   1      			printf("x is inexactive\n ");
  43   1      		else
  44   1      			printf("no root!\n");
  45   1      	else
  46   1      	{
  47   2      		s=b*b-4*a*c;
  48   2      		if(s>=0.0)
  49   2      			if(s>0.0)
  50   2      			{
  51   3      				t=sqrt(s);
  52   3      				x1=-0.5*(b+t)/a;
  53   3      				x2=-0.5*(b-t)/a;
  54   3      //				printf("There are two different roots:%f and %f\n"，x1,x2);
  55   3      				printf("There are two different roots:%f and %f\n",x1,x2);
C51 COMPILER V6.02  EX15                                                                   09/15/2002 22:22:16 PAGE 2   

  56   3      			}
  57   2      			else
  58   2      				printf("There are two equal roots:%f\n",-0.5*b/a);
  59   2      		else
  60   2      		{
  61   3      			t=sqrt(-s) ;
  62   3      			x1=-0.5*b/a; /*实部*/
  63   3      			x2=abs(0.5*t/a); /*虚部的绝对值*/
  64   3      			printf("There are two virtual roots:");
  65   3      			printf("%f+i%f\t\t%f-i%f\n",x1,x2,x1,x2 );
  66   3      		}
  67   2      	}
  68   1          while (1) {};
  69   1      }
  70          
  71          
  72          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    657    ----
   CONSTANT SIZE    =    192    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----      28
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


C51 COMPILATION COMPLETE.  0 WARNING(S),  0 ERROR(S)