按键控制数码管显示数字加减(共3页).doc

#include#define uchar unsigned char #define uint unsigned intuint num=0,num1=0;sbit key1=P30;sbit key2=P31;sbit key3=P32;sbit key4=P33;uchar table=0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f;void delayms(uint x) uint i,j; for(i=x;i0;i-) for(j=110;j0;j-);void display(uint num) uint shi,ge; shi=num/10; ge=num%10; P0=tableshi; P1=0xfd; delayms(5);P0=tablege; P1=0xfe; delayms(5);void keyscan()