计算器仿真

#include

#include"LCD1602.h"

#define uint unsigned int

#define uchar unsigned char

uchar a[16]={'0','1','2','3','4','5','6','7','8','9','+','-','*','/','='};

uchar b[10],c[10],out[6]; // 显示符号前符号后等号后uchar flag=0,fh=0,ql=0,denghao=0; // 标记

uint n=0,n1=0,n2=0; //位数

uint aa,s1,s2; //运算结果

void keyscan(); //检测按键

void fhq(); //符号前

void fhh(); //符号后

void yunsuan(); //运算

void fenjie(uint ); //分解

void delayms(uint); //延时

void qingling();

void dis() //显示

{

LCD_Prints(1,0,b);

}

void main() //主

{

LCD_Initial();

while(1)

{

keyscan();

if(ql==1)

{qingling();}

else

{

dis();

fhq();

fhh();

if(denghao==1) LCD_Prints(10,1,out);

}

}

}

void delayms(uint xms) //延时

{ uint k,j;

for(j=xms;j>0;j--)

for(k=113;k>0;k--);

}

void keyscan() //检测按键

{ uchar temp,key;

P3=0xfe;

temp=P3;

temp=temp&0xf0;

if(temp!=0xf0)

{

delayms(10);

if(temp!=0xf0)

{

temp=P3;

switch(temp)

{

case 0xee:

key=0;

break;

case 0xde:

key=1;

break;

case 0xbe:

key=2;

break;

case 0x7e:

key=3;

break;

}

while(temp!=0xf0)

{

temp=P3;

temp=temp&0xf0;

}

b[n]=a[key];

n++;

if(flag==1)

{ c[n2]=a[key];

n2++;

}

else n1++;

}

}

P3=0xfd;

temp=P3;

temp=temp&0xf0;

if(temp!=0xf0)

{

delayms(10);

if(temp!=0xf0)

{

temp=P3;

switch(temp)

{

case 0xed:

key=4;

break;

case 0xdd:

key=5;

break;

case 0xbd:

key=6;

break;

case 0x7d:

key=7;

break;

}

while(temp!=0xf0)

{

temp=P3;

temp=temp&0xf0;

}

b[n]=a[key];

n++;

if(flag==1)

{ c[n2]=a[key];

n2++;

}

else n1++;

}

}

P3=0xfb;

temp=P3;

temp=temp&0xf0;

if(temp!=0xf0)

{

delayms(10);

if(temp!=0xf0)

{

temp=P3;

switch(temp)

case 0xeb:

key=8;

b[n]=a[key];

n++;

if(flag==1)

{ c[n2]=a[key];

n2++;

}

else n1++;

break;

case 0xdb:

key=9;

b[n]=a[key];

n++;

if(flag==1)

{ c[n2]=a[key];

n2++;

}

else n1++;

break;

case 0xbb:

fh=0; //+

b[n]=a[10];

n++;

flag=1;

break;

case 0x7b: // -

fh=1;

b[n]=a[11];

n++;

flag=1;

break;

}

while(temp!=0xf0)

{

temp=P3;

temp=temp&0xf0;

}

}

P3=0xf7;

temp=P3;

temp=temp&0xf0;

if(temp!=0xf0)

{

delayms(10);

if(temp!=0xf0)

{

temp=P3;

switch(temp)

{

case 0xe7:

fh=2; //***

b[n]=a[12];

n++;

flag=1;

break;

case 0xd7:

fh=3; ///chu

b[n]=a[13];

n++;

flag=1;

break;

case 0xb7:

key=14; //====

b[n]=a[14];

denghao=1;

yunsuan();

break;

case 0x77:

key=15; //000

ql=1;

break;

}

while(temp!=0xf0)

{

temp=P3;

temp=temp&0xf0;

}

}

}

void fhq() //符号前数

{

if(flag==1)

{

switch(n1)

{ //char转化int十进制

case 1:{ s1= b[0]-0x30;} break;

case 2:{ s1=(b[0]-0x30)*10+b[1]-0x30;} b reak;

case 3:{ s1=(b[0]-0x30)*100+(b[1]-0x30)*10+b[2]-0x30;} break;

case 4:{ s1=(b[0]-0x30)*1000+(b[1]-0x30)*100+(b[3]-0x30)*10+b[3]-0x30;} break;

case

5:{ s1=(b[0]-0x30)*100000+(b[1]-0x30)*1000+(b[2]-0x30)*100+(b[3]-0x30)*10+b[4]-0x30;} break;

}

}

}

void fhh() //符号后数

{

if(flag==1)

switch(n2)

{

case 1:{ s2=c[0]-0x30;} break; //字符型char 转化int十进制

case 2:{ s2=(c[0]-0x30)*10+c[1]-0x30;} break;

case 3:{ s2=(c[0]-0x30)*100+(c[1]-0x30)*10+c[2]-0x30;} break;

case 4:{ s2=(c[0]-0x30)*1000+(c[1]-0x30)*100+(c[3]-0x30)*10+c[3]-0x30;} break;

case

5:{ s2=(c[0]-0x30)*100000+(c[1]-0x30)*1000+(c[2]-0x30)*100+(c[3]-0x30)*10+c[4]-0x30;} break;

}

}

void yunsuan()

{

switch(fh) //检验+ - * 、运算

{

case 0: { aa=s1+s2;fenjie(aa);} break;

case 1: { aa=s1-s2;fenjie(aa);} break;

case 2: { aa=s1*s2;fenjie(aa);} break;

case 3: { aa=s1/s2;fenjie(aa);} break;

}

}

void fenjie(uint b) //分解

{if(100000>b&&b>=10000) //比较数的大小去前面的零{

out[0]=b/10000+0x30;

out[1]=b%10000/1000+0x30;

out[2]=b%1000/100+0x30;

out[3]=b%100/10+0x30;

out[4]=b%10+0x30;

}

if(10000>b&&b>=1000)

{

out[0]=b/1000+0x30;

out[1]=b%1000/100+0x30;

out[2]=b%100/10+0x30;

out[3]=b%10+0x30;

}

if(1000>b&&b>=100)

{

out[0]=b/100+0x30;

out[1]=b%100/10+0x30;

out[2]=b%10+0x30;

}

if(100>b&&b>=10)

{

out[0]=b/10+0x30;

out[1]=b%10+0x30;

}

if(10>b&&b>=0)

{

out[0]=b%10+0x30;

}

}

void qingling()

{

uint i ,j;

for(i=0;i<=n;i++)

{

b[i]='\n';

}

for(j=0;j<6;j++)

{

out[j]='\n';

}

LCD_Prints(1,0,b);

LCD_Prints(10,1,out);

n=0;

flag=0;

n1=0;

n2=0;

denghao=0;

ql=0;

}