假設P0 P2口接數碼管 程式如下

include

#define uchar unsigned char

#define uint unsigned int

uchar num=0;

//共陰數碼管七段碼

uchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d, 0x07,0x7f,0x6f,0x77};

void Delay1ms(uint i) //1ms延時程式

{

uint j;

for(;i>0;i--)

{

for(j=0;j

{;}

}

}

void main(void )//主程式

{

while(1)

{

delay_ms(1000);

num++;

if(num==100)num=0;

P0=table[num/10];

P2=table[num%10];