简单计算器的设计方法

1、简单计算器的设计#include <</font>reg51.h>#include <</font>intrins.h>#include <</font>ctype.h>            #include <</font>stdlib.h>             #define uchar unsigned char#define uint unsigned in

2、t uchar operand19, operand29;  uchar operator;                      void delay(uint);uchar keyscan();void disp(void);void buf(uint value);uint compute(uint va1,uint va2,uchar optor); uchar code table = 0xc0,0xf9,0xa4,0xb0,0x9

3、9,                0x92,0x82,0xf8,0x80,0x90,0xff;      uchar dbuf8 = 10,10,10,10,10,10,10,10;                     void delay(uint z)uint x,y;for(x=z;x>0;x-)    for(y=11

4、0;y>0;y-);  uchar keyscan()    uchar skey;                              P1 = 0xfe;    while(P1 & 0xf0) != 0xf0)                  

5、0; delay(3);                             while(P1 & 0xf0) != 0xf0)                        switch(P1)                 

6、;                           case 0xee: skey = '7' break;                case 0xde: skey = '8' break;                case 0xbe: skey = '

7、9' break;                case 0x7e: skey = '/' break;                                    default:   skey = '#'        &#

8、160;                while(P1 & 0xf0) != 0xf0)                 ;                  P1 = 0xfd;        while(P1 & 0xf0) != 0xf0)   

9、         delay(3);         while(P1 & 0xf0) != 0xf0)                    switch(P1)                            case 0xed: skey = 

10、9;4' break;                case 0xdd: skey = '5' break;                case 0xbd: skey = '6' break;                case 0x7d: skey = '*' break;  &#

11、160;                                 default:   skey = '#'                         while(P1 & 0xf0) != 0xf0)      

12、0;         ;                   P1 = 0xfb;    while(P1 & 0xf0) != 0xf0)            delay(3);                while(P1 & 0xf0) != 0xf0)

13、                    switch(P1)                            case 0xeb: skey = '1' break;                case 0xdb: skey = '2'

14、break;                case 0xbb: skey = '3' break;                case 0x7b: skey = '-' break;                             

15、      default: skey = '#'                         while(P1 & 0xf0) != 0xf0)                ;                   P1

16、 = 0xf7;    while(P1 & 0xf0) != 0xf0)            delay(3);         while(P1 & 0xf0) != 0xf0)                    switch(P1)               

17、             case 0xe7: skey = '$' break;                case 0xd7: skey = '0' break;                case 0xb7: skey = '=' break;          &#

18、160;     case 0x77: skey = '+' break;                                    default:   skey = '#'                     

19、0;   while(P1 & 0xf0) != 0xf0)                ;                 return skey; void main()        uint value1, value2, value;               uch

20、ar ckey, cut1 = 0, cut2 = 0;        uchar operator;                           uchar i, bool = 0; init:                             

21、0;          buf(0);                                disp();    value = 0;    cut1 = cut2 = 0;    bool = 0;    for(i = 0;i <</font> 9;i+) 

22、           operand1i = '0'        operand2i = '0'                                          while(1)        &#

23、160;   ckey = keyscan();                     if(ckey != '#')                     if(isdigit(ckey)                     

24、0;               switch(bool)                                        case 0:                         

25、;   operand1cut1 = ckey;                            operand1cut1+1 = '0'                            value1 = atoi(operand1);      &#

26、160;                       cut1+;                            buf(value1);                            disp

27、();                            break;                    case 1:                            operand2cut2 = cke

28、y;                            operand2cut2+1 = '0'                            value2 = atoi(operand2);              &

29、#160;             cut2+;                            buf(value2);                            disp();       

30、60;                   break;                                                default: break;          

31、0;                             else if(ckey='+'|ckey='-'|ckey='*'|ckey='/')                            bool = 1;    &#

32、160;               operator = ckey;                buf(0);                dbuf7 = 10;                disp();          &#

33、160;             else if(ckey = '=')                            value = compute(value1,value2,operator);                buf(value);     

34、          disp();                while(1)                                                      

35、   ckey = keyscan();                    if(ckey = '$')                                  goto init;               

36、;     else                                                    buf(value);                       

37、60;   disp();                                                                else if(ckey = '$')       

38、0;        goto init;                disp();       uint compute(uint va1,uint va2,uchar optor)    uint value;     switch(optor)            case '+' : val

39、ue = va1+va2;    break;        case '-' : value = va1-va2;    break;        case '*' : value = va1*va2;    break;        case '/' : value = va1/va2;    break;    

40、0;           default :  break;        return value;  void buf(uint val)    uchar i;    if(val = 0)            dbuf7 = 0;        i = 6;       

41、0;    else        for(i = 7; val > 0; i-)                    dbufi = val % 10;            val /= 10;                for( ; i > 0; i-) 

42、       dbufi = 10;  void disp(void)    uchar bsel, n;        bsel=0x01;    for(n=0;n<</font>8;n+)             P2=bsel;        P0=tabledbufn;       

43、; bsel=_crol_(bsel,1);        delay(3);        P0=0xff;    音乐播放器  /*  歌曲选择时应按住设置间3秒以上，然后按上或下键进行选择，然后再按设置键退出 */ #include<reg52.h> sbit spek=P37;  /声音输出端 sbit set=P32;  /设定及退出键

44、,按奇数次为设定功能；偶数次为退出功能 sbit up=P31;  /上一曲 sbit down=P30;  /下一曲 bit flag1,flag2;  /按键扫描标志位，新键值标志位 unsigned char f_t,n,i,key,k_max; /音符频率对应的二分之一周期值，节拍常数值，查表用计数器，键值，最大键值 unsigned char *p_music;  /指向音乐数

45、据数组的指针 void timer_ms(unsigned char tim);  /毫秒级延时函数声明 void timer_us(unsigned char t);  /微秒级延时函数 void key_scan(void);  /按键扫描函数 void key_manage();  /键值处理函数  /格式为：频率常数，节拍常数，频率常数，节拍常数 unsign

46、ed char code music_table1=0x18,0x30,0x1c,0x10,0x20,0x40,0x1c,0x10,0x18, 0x10,0x20,0x10,0x1c,0x10,0x18,0x40,0x1c,0x20,0x20,0x20,0x1c,0x20,0x18,0x20,0x20,0x80, 0xff,0x20,0x30,0x1c,0x10,0x18,0x20,0x15,0x20,0x1c,0x20,0x20,0x20,0x26,0x40,0x20,0x20, 0x2b,0x20,0x26,0x20,0x20,0

47、x20,0x30,0x80,0xff,0x20,0x20,0x1c,0x10,0x18,0x10,0x20,0x20, 0x26,0x20,0x2b,0x20,0x30,0x20,0x2b,0x40,0x20,0x20,0x1c,0x10,0x18,0x10,0x20,0x20,0x26, 0x20,0x2b,0x20,0x30,0x20,0x2b,0x40,0x20,0x30,0x1c,0x10,0x18,0x20,0x15,0x20,0x1c,0x20, 0x20,0x20,0x26,0x40,0x20,0x20,0x2b,0x20,0x26,0x20,0x2

48、0,0x20,0x30,0x80,0x20,0x30,0x1c, 0x10,0x20,0x10,0x1c,0x10,0x20,0x20,0x26,0x20,0x2b,0x20,0x30,0x20,0x2b,0x40,0x20,0x15, 0x1f,0x05,0x20,0x10,0x1c,0x10,0x20,0x20,0x26,0x20,0x2b,0x20,0x30,0x20,0x2b,0x40,0x20, 0x30,0x1c,0x10,0x18,0x20,0x15,0x20,0x1c,0x20,0x20,0x20,0x26,0x40,0x20,0x20,0x2b,

49、0x20, 0x26,0x20,0x20,0x20,0x30,0x30,0x20,0x30,0x1c,0x10,0x18,0x40,0x1c,0x20,0x20,0x20,0x26, 0x40,0x13,0x60,0x18,0x20,0x15,0x40,0x13,0x40,0x18,0x80,0x00; /八月桂花香 unsigned char code music_table2=0x26,0x20,0x20,0x20,0x20,0x20,0x26,0x10,0x20,0x10,0x20,0x80, 0x26,0x

50、20,0x30,0x20,0x30,0x20,0x39,0x10,0x30,0x10,0x30,0x80,0x26,0x20,0x20,0x20,0x20,0x20,0x1c,0x20, 0x20,0x80,0x2b,0x20,0x26,0x20,0x20,0x20,0x2b,0x10,0x26,0x10,0x2b,0x80,0x26,0x20,0x30,0x20,0x30,0x20, 0x39,0x10,0x26,0x10,0x26,0x60,0x40,0x10,0x39,0x10,0x26,0x20,0x30,0x20,0x30,0x20,0x39,0x10,0x26,

51、0x10, 0x26,0x80,0x26,0x20,0x2b,0x10,0x2b,0x10,0x2b,0x20,0x30,0x10,0x39,0x10,0x26,0x10,0x2b,0x10,0x2b,0x20, 0x2b,0x40,0x40,0x20,0x20,0x10,0x20,0x10,0x2b,0x10,0x26,0x30,0x30,0x80,0x18,0x20,0x18,0x20,0x26,0x20, 0x20,0x20,0x20,0x40,0x26,0x20,0x2b,0x20,0x30,0x20,0x30,0x20,0x1c,0x20,0x20,0x

52、20,0x20,0x80,0x1c,0x20, 0x1c,0x20,0x1c,0x20,0x30,0x20,0x30,0x60,0x39,0x10,0x30,0x10,0x20,0x20,0x2b,0x10,0x26,0x10,0x2b,0x10, 0x26,0x10,0x26,0x10,0x2b,0x10,0x2b,0x80,0x18,0x20,0x18,0x20,0x26,0x20,0x20,0x20,0x20,0x60,0x26,0x10, 0x2b,0x20,0x30,0x20,0x30,0x20,0x1c,0x20,0x20,0x20,0x20,0x80

53、,0x26,0x20,0x30,0x10,0x30,0x10,0x30,0x20, 0x39,0x20,0x26,0x10,0x2b,0x10,0x2b,0x20,0x2b,0x40,0x40,0x10,0x40,0x10,0x20,0x10,0x20,0x10,0x2b,0x10, 0x26,0x30,0x30,0x80,0x00;  /祝你平安 unsigned char code music_table3=0x20,40,0x26,20,0x20,20,0x17,80,0x1c,40,0x17,40,0x20

54、,80,0x20, 40,0x2f,20,0x2a,20,0x26,40,0x2a,20,0x2f,20,0x2a,80,0xff,0x20,40,0x26,20,0x20,20,0x17,60,0x19,20, 0x1c,40,0x17,40,0x20,80,0x20,40,0x2a,20,0x26,20,0x24,60,0x32,20,0x2f,80,0xff,0x1c,40,0x17,40,0x17, 80,0x19,40,0x1c,20,0x19,20,0x17,80,0x1c,20,0x19,20,0x17,20,0x1c,20,0x1c,20,0x20

55、,20,0x26,20,0x2f,20, 0x2a,80,0xff,0x20,40,0x26,20,0x20,20,0x17,60,0x19,20,0x1c,40,0x17,40,0x20,80,0x20,40,0x2a,20,0x26, 20,0x24,60,0x32,20,0x2f,80,0xff,0x20,40,0x26,20,0x20,20,0x17,80,0x1c,40,0x17,40,0x20,80,0x20,40, 0x2f,20,0x2a,20,0x26,40,0x2a,20,0x2f,20,0x2a,80,0xff,0x20,40,0x26,20

56、,0x20,20,0x17,60,0x19,20,0x1c, 40,0x17,40,0x20,80,0x20,40,0x2a,20,0x26,20,0x24,60,0x32,20,0x2f,80,0;  /送别  main()      spek=0;     P3=0x7f;     TMOD=0x01;  /T0工作于方式1，即16位定时器模式 

57、0;   IE=0x82;  /开总中断，T0中断     flag2=0;  /     flag1=0;     key=1;       k_max=3;  /最大键值（取值范围1254）     n=0;  &#

58、160;  i=0;  p_music=music_table1;  /指针赋初值     while (1)              switch (p_musici)             &

59、#160;      case 0x00: i=0;  /歌曲完，则停止0.5S后重新开始             timer_ms(250);  /延时0.25ms             timer_ms(250);

60、             break;         case 0xff: i+;  /遇到休止符则停止100us             timer_ms(250);   &#

61、160;timer_ms(250);             break;         default:   f_t=p_musici+;             n=p_musici+;  &#

62、160;          spek=1;             TR0=1;             while (n!=0)        &#

63、160;                     spek=spek;                 timer_us(4*f_t);  /改变f_t前面的系数可以调整音符频率的高低 &#

64、160;                     TR0=0;             spek=0;    if(set=0)       

65、0; key_scan();     key_manage();                     /* 函数名称： 定时器0的中断处理程序 函数功能： 完成10毫秒定时 入口参数：  出口参数：  其  

66、0;   它：  */ void timer0() interrupt 1 using 2      TH0=(65536-10000)/256;  /定时10毫秒     TL0=(65536-10000)%256;     n-;   /* 函数名称： 延

67、时程序 函数功能： 完成微秒级的延时 入口参数： t为需延时的时间（取值范围1255；延时时间51275us） 出口参数：  其      它：  */ void timer_us(unsigned char t)      while (-t);  /本语句执行一次需5us的时间   /

68、* 函数名称： 按键扫描函数 函数功能： 完成按键扫描处理 入口参数： 应为在中断函数中被调用，所以不能有参数传递 出口参数：  其      它：  */ void key_scan(void)      timer_ms(10);  /延时10ms等待按键状态稳定     i

69、f (set=0)  /再次确认                 while (set=0);  /等待按键松开         flag1=1;  /该位为1，表示进入按键扫描处理；为0，表示本次按键扫描处理完成    

70、;     while (flag1)                         if (up=0)  /加一键            

71、;                  timer_ms(10);                 if (up=0)          &#

72、160;                           while (!up);                   

73、60; key+;                     if (key>k_max) key=1;                     

74、                      if (down=0)  /减一键                      

75、0;       timer_ms(10);                 if (down=0)                     

76、;                 while (!down);                     key-;        

77、;             if (key<1) key=k_max;                               &

78、#160;  if (set=0)  /退出键                              timer_ms(10);          

79、;       if (set=0)                                      while (se

80、t=0);                     flag1=0;  /表示本次按键扫描处理完成                     flag2=1;&#

81、160; /该位置1，表示有新键值要处理                              /以上键值处理的范围为1到254个键值            

82、0;    /* 函数名称： 键值处理函数 函数功能： 完成按键键值的处理 入口参数： 应为在中断函数中被调用，所以不能有参数传递 出口参数：  其      它：  */void key_manage()      flag2=0;     switch (

83、key)          case 1: p_music=music_table1;  /键值为1 播放第一首乐曲             goto kh1;     case 2: p_music=&music_table20;

84、  /键值为2 播放第2首乐曲             goto kh1;  case 3: p_music=&music_table30;  /键值为3 播放第3首乐曲             goto kh1

85、;       default:  key=1;              p_music=music_table1; kh1: TH0=(65536-10000)/256;      TL0=(65536-10000)%256;      break;       n=0;     i=0; &#