hex文件及其工程文件下載：http://www.51hei.com/f/pingfc.rar 下面是程序源碼：

/*
*功能：使用矩陣按鍵使得按鍵按下時(shí)數(shù)碼管上顯示各自對(duì)應(yīng)的數(shù)字的立方數(shù)
* 優(yōu)化顯示，只顯示有效位；
* 且使用獨(dú)立按鍵實(shí)現(xiàn)key1清零，key2加數(shù)，key3減數(shù)；
*日期：2013-05-07-10:20
*作者：徐冉
*特別說(shuō)明：本程序代碼已經(jīng)通過(guò)調(diào)試，僅供學(xué)習(xí)使用；
*
*/
/***********AT89C52-RC單片機(jī)-51hei實(shí)驗(yàn)板***********/
/*****************51hei開(kāi)發(fā)板*********************/

#include
typedef unsigned int uint;
typedef unsigned char uchar;
sbit wela = P2^7;
sbit dula = P2^6;
sbit key1 = P3^4;
sbit key2 = P3^5;
sbit key3 = P3^6;
sbit fm = P2^3;
uint temp;
uchar code table[] = {
0x3F, //"0"
0x06, //"1"
0x5B, //"2"
0x4F, //"3"
0x66, //"4"
0x6D, //"5"
0x7D, //"6"
0x07, //"7"
0x7F, //"8"
0x6F, //"9"
0x77, //"A"
0x7C, //"B"
0x39, //"C"
0x5E, //"D"
0x79, //"E"
0x71, //"F"
0x76, //"H"
0x38, //"L"
0x37, //"n"
0x3E, //"u"
0x73, //"P"
0x5C, //"o"
0x40, //"-"
0x00, //熄滅
0x00 //自定義
};
// uchar key; Error!!! 此時(shí)的key值大于258 超出了uchar 故錯(cuò)誤??！
uint key;
void display(num);
void delay(uint xms);
void max_kanscan();
void keyscan();
void main(void)
{
while(1)
{
keyscan();
max_kanscan();
display(key);
}
}

void display(num)
{
uchar qian, bai, shi, ge;
qian = num / 1000 % 10;
bai = num / 100 % 10;
shi = num / 10 % 10;
ge = num % 10;

if(num < 10)
{
dula = 1;
P0 =table[ge];
dula = 0;
P0 = 0xff;
wela = 1;
P0 = 0xfe;
wela = 0;
}
else if(num < 100)
{
dula = 1;
P0 =table[shi];
dula = 0;
P0 = 0xff;
wela = 1;
P0 = 0xfe;
wela = 0;
P0 = 0x00;
delay(1);

dula = 1;
P0 =table[ge];
dula = 0;
P0 = 0xff;
wela = 1;
P0 = 0xfd;
wela = 0;
P0 = 0x00;
delay(1);
}
else if(num < 1000)
{
dula = 1;
P0 =table[bai];
dula = 0;
P0 = 0xff;
wela = 1;
P0 = 0xfe;
wela = 0;
P0 = 0x00;
delay(1);

dula = 1;
P0 =table[shi];
dula = 0;
P0 = 0xff;
wela = 1;
P0 = 0xfd;
wela = 0;
P0 = 0x00;
delay(1);

dula = 1;
P0 =table[ge];
dula = 0;
P0 = 0xff;
wela = 1;
P0 = 0xfb;
wela = 0;
P0 = 0x00;
delay(1);
}
else if(num < 10000)
{
dula = 1;
P0 =table[qian];
dula = 0;
P0 = 0xff;
wela = 1;
P0 = 0xfe;
wela = 0;
P0 = 0x00;
delay(1);

dula = 1;
P0 =table[bai];
dula = 0;
P0 = 0xff;
wela = 1;
P0 = 0xfd;
wela = 0;
P0 = 0x00;
delay(1);

dula = 1;
P0 =table[shi];
dula = 0;
P0 = 0xff;
wela = 1;
P0 = 0xfb;
wela = 0;
P0 = 0x00;
delay(1);

dula = 1;
P0 =table[ge];
dula = 0;
P0 = 0xff;
wela = 1;
P0 = 0xf7;
wela = 0;
P0 = 0x00;
delay(1);
}

}