片机c语言计算器代码

1、/8位液晶数码管显示的计算器，代码通俗易懂/用到数码管、矩阵键盘、中断三个模块#includereg52.h#includestdio.htypedef unsigned char uchar;typedef unsigned int uint;sbit Wei = P23;/定义74hc573d锁存器端口，控制数码管位码；sbit Duan = P22;/定义74hc573d锁存器端口，控制数码管段码；code uchar WeiMa = 0 xfe,0 xfd,0 xfb,0 xf7,0 xef,0 xdf,0 xbf,0 x7f;/共阴数码管点亮位，从第0位到第7位，共8个；code u

2、int DuanMa = 0 x3f,0 x06,0 x5b,0 x4f,0 x66,0 x6d,0 x7d,0 x07,0 x7f,0 x6f;/共阴数码管显示的值“09”；uchar DuanMaZhi8;/储存数码管显示值的全局变量；Timer_0();/数码动态扫描的定时器函数；Delay(uint t);/按键去抖的延迟函数；Key_1();/矩阵键盘扫描函数；Key_2();/矩阵键盘返回值函数；main()uchar n,i,L,F,T8,s;uint a = 0,b = 0;Timer_0();DuanMaZhi0 = DuanMa0;/复位后数码管显示“0”while(1)n

3、 = Key_2();/变量n存储函数返回值if(n != 0 xff)/检测到有返回值if(i = 0)for(s = 0;s 8;s+)DuanMaZhis = 0;/清除缓冲区if(8 = i) | (+ = n) | (- = n) | (x = n) | (/ = n) | (= = n)/检测到下列符号则代表输 /入结束；i = 0;if(F = 0) /第一个输入值赋给a；sscanf(T,%d,&a);/输入值存储到变量a，下同；F = 1;elsesscanf(T,%d,&b);for(s = 0;s 8;s+)Ts = 0;/清除缓存区的值； if(n != =)/判断是否

4、为等号，做下标记；L = n;elseF = 0;switch(L)/计算操作case +:a = a + b;break;case -:a = a - b;break;case x:a = a * b;break;case /:a = a / b;break;default:break;sprintf(T,%d,a);for(s = 0;s 8;s+)if(Ts = 0) /如果检测到null,则数码管不显示；DuanMaZhis = 0;else if(Ts = 0 x2d) /如果为负号则在段码显示负号；DuanMaZhis = 0 x40;elseDuanMaZhis = DuanMa

5、Ts - 0;/从ascall码计算数值L = 0; /全部清零；a = b = 0;for(s = 0;s 8;s+)Ts = 0;else if(i 16)Ti = n + 0;DuanMaZhii = DuanMan;/输出数据；i+;Key_1()/矩阵键盘翻转扫描uchar i,j;P1 = 0 x0f;if(P1 != 0 x0f)Delay(4500);/去除按键抖动；if(P1 != 0 x0f)i = P1;P1 = i | 0 xf0;j = P1 & 0 xf0;while(P1 & 0 xf0) != 0 xf0);return (i + j);return(0 xff

6、);Key_2()switch(Key_1()/根据扫描结果返回值给ncase 0 x7e:return 1 ;break;case 0 xbe:return 2 ;break;case 0 xde:return 3 ;break;case 0 xee:return +;break;case 0 x7d:return 4 ;break;case 0 xbd:return 5 ;break;case 0 xdd:return 6 ;break;case 0 xed:return -;break;case 0 x7b:return 7 ;break;case 0 xbb:return 8 ;bre

7、ak;case 0 xdb:return 9 ;break;case 0 xeb:return x;break;case 0 x77:return 0 ;break;case 0 xb7:return .;break;case 0 xd7:return =;break;case 0 xe7:return /;break;default:return 0 xff ;break;Timer_0() /定时器0初始化TMOD = 0 x01;TR0 = 1;ET0 = 1;EA = 1;Interrupt_0() interrupt 1 /数码管中断扫描；static uchar i = 0;TH0 = 0 xf8;TL0 = 0 x30;P0 = 0; /清除数码管缓存；Duan = 1;Duan