基于51单片机的小计算器的仿真+代码设计数码管显示一位的数的加减乘除 -

#include<reg52.h>
#include<intrins.h>
#include<math.h>
sbit Sel1=P3^0;
sbit Sel2=P3^1;
sbit Sel3=P3^2;
sbit Sel4 =P3^3;
sbit Sel5=P3^4;
sbit Sel6 =P3^5;
sbit led=P2^0;
unsigned char line=0,cross=0,comline=0,comcross=0;//显示扫描后的行列值
unsigned char shu1=0,shu2=0;//显示计算的数据
unsigned char keynum=0,workflag=0;
int keyflag=0,i=0,cons=0,cons1,cons2; //显示按键和运算状态的逻辑标志变量
unsigned char Shuma[10]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};//数码管段码值
unsigned char Shuma1[10]={0xbf,0x86,0xdb,0xcf,0xe6,0xed,0xfd,0x87,0xff,0xef};//数码管段码值
void delay(int k); //延时函数
void Keycode(); //键盘编码函数
void Keys(); //键盘扫描函数
void main()
{
unsigned char n=0;
unsigned int temp=0;
TMOD=0x01;
TH0=(2^16-50000)/2^8;TL0=(2^16-50000)%2^8;EA=1;TR0=1;ET0=1;
while(1)
{
Keycode();
if(keyflag == 1)
shu1 = keynum;
else if(keyflag == 2)
shu2 = keynum;
else if(keyflag == 3)
{
switch(workflag)
{
case 1:cons = shu1+shu2;break;
case 2:cons = shu1-shu2;break;
case 3:cons = shu1*shu2;break;
case 6:temp =(int)(((float)(shu1)/(float)(shu2))*10);cons1 = temp/10;cons2=temp%10;
break;
default:break;
}
}
else ;
if (workflag == 5)
{
keyflag = 0;cross=0;line=0;workflag=0;keynum=0;P0=0xff;
shu1=0;shu2=0;cons=0;
}
for(n=0;n<8;n++)
{
switch(n)
{
case 0:Sel1=1,Sel2=0,Sel3=0,Sel4=0,Sel5=0,Sel6=0;P0=~Shuma[shu1/10];break;
case 1:Sel1=0,Sel2=1,Sel3=0,Sel4=0,Sel5=0,Sel6=0;P0=~Shuma[shu1%10];break;
case 2:Sel1=0,Sel2=0,Sel3=1,Sel4=0,Sel5=0,Sel6=0;P0=~Shuma[shu2/10];break;
case 3:Sel1=0,Sel2=0,Sel3=0,Sel4=1,Sel5=0,Sel6=0;P0=~Shuma[shu2%10];break;
case 4:Sel1=0,Sel2=0,Sel3=0,Sel4=0,Sel5=1,Sel6=0;
if(cons >= 0)
P0=~Shuma[cons/10];
else
P0=0xBF;
if(workflag == 6)
{
P0=~Shuma1[cons1];
}break;
case 5:Sel1=0,Sel2=0,Sel3=0,Sel4=0,Sel5=0,Sel6=1;
P0=~Shuma[abs(cons)%10];
if(workflag == 6)
P0=~Shuma[cons2];break;
default:break;
}
delay(20);
P0=0xff;
}
}
}
void delay(int k)
{
while(k--);
}
void Keycode()
{
switch(cross)
{
case 1:
switch(line)
{
case 1:keynum=1;break;
case 2:keynum=2;break;
case 3:keynum=3;break;
case 4:workflag=1;break;
default:break;
};break;
case 2:
switch(line)
{
case 1:keynum=4;break;
case 2:keynum=5;break;
case 3:keynum=6;break;
case 4:workflag=2;break;
default:break;
};break;
case 3:
switch(line)
{
case 1:keynum=7;break;
case 2:keynum=8;break;
case 3:keynum=9;break;
case 4:workflag=3;break;
default:break;
};break;
case 4:
switch(line)
{
case 1:keynum=0;break;
case 2:workflag=4;break;
case 3:workflag=5;break;
case 4:workflag=6;break;
default:break;
};break;
default:break;
}
}
void Keys()
{
P1=0xf0;
if( P1 != 0xf0)
keyflag++;
switch(P1)
{
case 0x70:cross=1;break;
case 0xb0:cross=2;break;
case 0xd0:cross=3;break;
case 0xe0:cross=4;break;
}
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