為什么小于20時奇數取余錯了。比如3除2取余顯示的是1.0不是1.5

ID:853017 · 發表于 2020-12-2 17:15

#include<reg51.h>
#define uchar unsigned char

#define dula P0
#define wela P2

sbit k4=P3^6;
sbit k5=P3^7;
sbit beep=P2^3;

bit stop=1,scp=0;

unsigned char j,k,num0,num1,num2,num3,sec,min,count=0;
unsigned char time_count;
unsigned char code weitable[]={0x8f,0x4f,0x2f,0x1f};

unsigned char code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,
0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};

unsigned char code table1[]={0xbf,0x86,0xdb,0xcf,0xe6,0xed,0xfd,
0x87,0xff,0xef};

void delay(unsigned char i)
{
for (j=i;j>0;j--)
   for(k=125;k>0;k--);
}

void display1 (uchar wei,uchar shu)
{
wei=wei-1;
wela|=0xf0;

if(wei==3)
P0=table1[shu];
else
P0=table[shu];
wela=wela&weitable[wei];
delay(10);

if(sec<10)
if(wei==1)
P0=table1[shu];
else
P0=table[shu];
wela=wela&weitable[wei];
delay(10);

}

void display(unsigned char c,unsigned char d)
{
display1 (4,0);
display1 (3,5);

if(sec<10)
{
display1 (1,c);
display1 (2,d);
}
else if(sec>9)
{
display1 (2,c);
display1 (1,d);
}

}

void start_timer()
{
ET0=1;
EA=1;
TR0=1;
}

void stop_timer()
{

ET0=0;
EA=0;
TR0=0;
}

void main()
{
int z=0;
TMOD=0x01;
TH0=(65536-46080)/256;
TL0=(65536-46080)%256;

while(1)
{
if(k4==0)
{
delay(10);
if(k4==0)
{
     while(k4==0);
{
if(stop)
{
start_timer();
scp=~scp;
stop=~stop;
beep=1;
sec=0;

}
}

   }

   }
if(k5==0)
   {
   delay(10);
if(k5==0)
{

while(k5==0);
{

stop_timer();
scp=~scp;
stop=1;
}
}

   }


if(time_count==20)
   {
      count=0;
time_count=0;
sec++;
if(sec==100)
{
sec=0;

}
beep=0;
delay(10);
beep=1;
   }
   if(scp==1)
   {
   num0=sec%10;
   num1=sec/10;
   display(num1,num0);
   }
   else if(scp==0)
   {
   num0=sec/2%10;
   num1=sec/2/10;
   display(num1,num0);
   }
}
}

void rimer0()interrupt 1
{
TH0=(65536-46080)/256;
TL0=(65536-46080)%256;
time_count++;
}