1、 0xed,0xdd,0xbd,0x7d, 0xeb,0xdb,0xbb,0x7b, 0xe7,0xd7,0xb7,0x77;char code table2=789/456*123-.0=+;char j,k,temp,temp1,temp2,key,mchar,m,flag2=0,flag3=0;long x,y,num;int operators,input,iny;char error5=errorchar overflow8=overflowchar welcome_16=welcome to use !void delay(uint x)/延时 uint a,b; for(a=x;
2、a0;a-) for(b=10;bb-);void delay_ms(uint x)/延时 for(b=110;void write_com(uchar com)/写命令 P0=com; rs=0; lcden=0; delay(10); lcden=1;void write_data(uchar date)/写数据 P0=date; rs=1; long ming(int x) long m; switch(x) case 9:m=1000000000;return m;break; case 8:m=100000000; case 7:m=10000000; case 6:m=100000
3、0; case 5:m=100000; case 4:m=10000; case 3:m=1000; case 2:m=100; case 1:m=10; case 0:m=1; void display(long a) long d; int i,flag1=0,temp,c=-1; init(); if(a=0;i-) d=ming(i); temp=a/d; a=a%d; if(temp=0)&(flag1=0) ; else write_data(0x30+temp); flag1=1; if(i=2).void init()/LCD初始化 rw=0; dula=0; wela=0;
4、write_com(0x38); /显示模式设置:162显示,57点阵,8位数据接口 delay(20); write_com(0x0e); /显示模式设置 write_com(0x06);光标右移,字符不移 write_com(0x01); /清屏幕指令,将以前的显示内容清除void yunsuan() / 运算if (iny)switch(operators)case 1:x=x+y;num=x;if(num-10000000000)display(num);elsedataoverflow();case 2:x=x-y; case 3:x=x*y;num=x/100;case 4:if
5、(y=0)dealerror();if(y100)x=x*100;y=y*100;y=y/100;x=x/y;y=0;void dealerror()/除数为0int i=0;write_com(0x01);for(i=0;i5;i+)write_data(errori);void dataoverflow()/数值溢出8;write_data(overflowi);void welcome()/欢迎界面16;write_data(welcome_i);void keyinput(char s) /键盘输入if(s0) /判断按下的键是否为数值 if(flag3=0) num=num*10+1
6、00*(s- num=num*10+10*(s- if(flag2=1) num=num/10; flag3=1; if (operators y=num; iny=1; x=num; if(num-10000000000) /当前数值是否超出限定范围 display(num); dataoverflow(); switch(s) case : /*iny=0; operators=0;*/ flag2=1; break; write_data(table214); yunsuan(); iny=0; num=0; flag2=0; flag3=0;+ if (operators) opera
7、tors=1; write_data(table215); operators=2; write_data(table211);* operators=3; write_data(table27);flag3=0;/ operators=4; write_data(table23);void main() /主函数 char i; char flag0=1; welcome(); for(i=0;10; delay_ms(100); while(1) P3=0xf0; temp1=P3; P3=0x0f; temp2=P3; temp=temp1|temp2; while(P3!=0x0f) beep=0; beep=1; if(temp=table1i) m=table2i; flag0=0; if(flag0=0) keyinput(m); flag0=1;
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