main.h

这是自己用一个单片机做的计算器

#define uchar unsigned char
#define uint  unsigned int
#define ulong unsigned long


 //*********************变量及I/O口定义 ************************//

sbit clk=P1^5;		                                  // clk 连接于 P1.5
sbit dat=P1^3;		                                  // dat 连接于 P1.3
sbit key=P1^4;		                                  // key 连接于 P1.4

 extern  xdata  uchar opention_i[8];     //键盘输入整数存储区
 extern  xdata  uchar opention_f[8];     //键盘输入小数存储区
 extern  xdata   uchar mkey; 
 extern  float float_a1;
 extern  float float_a2;
 extern  xdata uchar float_count,int_count ;
 
 
 
 
 extern   float f_data;	
 extern  xdata uchar indata[20];
 extern xdata  uchar out_data[10];
 extern code uchar p_float[7];
 extern code uchar sign[7];	
				   

 extern  float add_all(uchar *p_i,uchar *p_f,uchar count);




extern  void delay(unsigned int dd)	  ;
extern  unsigned char receive(void)  ;
extern  void wr_7281(unsigned char b)	;
extern  void setdisplay(unsigned char *p,unsigned char digit)	  ;
extern  void LED_OUT();