#include "reg52.h"
#include "string.h"
#include "stdio.h"
#include "lcd1602.h"
#include "keyboard.h"
#define keydeng 14
#define keyzuoyi 12
code unsigned char KeyDisPlaybuf[16] =
{
'1', '2', '3', '+',\
'4', '5', '6', '-',\
'7', '8', '9', '*',\
'<', '0', '=', '/'
};
long Count(char *ch, char len)//简单计算器 仅支持加减乘除+-*/
{
unsigned char i = 0;
char Operation;
long Num1=0,Num2=0;
while(i<len && ch!='+' && ch!='-' && ch!='*' && ch!='/')
{
Num1*=10;
Num1+=ch-'0';
i++;
}
Operation=ch[i++];
while(i<len && ch!='=')
{
Num2*=10;
Num2+=ch-'0';
i++;
}
switch(Operation)
{
case'+':return Num1+Num2;
case'-':return Num1-Num2;
case'*':return Num1*Num2;
case'/':return Num1/Num2;
}
return 0;
}
void EasyCounter(void)
{
unsigned char buff[30];
unsigned char text[30];
unsigned char key;
unsigned char i = 0;
do
{
key = keycan();//读取键值
if(key!=0xff)//键值不等于0
{
text[i++]=KeyDisPlaybuf[key];//记录键值对应的字符
文本='\0';
LCD_ShowStr(0,0,“ ”);
LCD_ShowStr(16-strlen(文本),0,文本);
}
if(key==keyzuoyi&&i>0)//按下“<”时删除一位
i-=2;
}while(key!=keydeng);//按下'='时结束输入
sprintf(buff, “%ld”, Count(text, strlen(text)));
LCD_ShowStr(0,1,“ ”);
LCD_ShowStr(16-粗),1,浅黄色);
}
空主(空)
{
LCD_Init();
而(1)
{
易计数器();
}
}