51单片机怎么用矩阵键盘让数码管加一减一，就是每两个键盘控制一个数

#include #define uchar unsigned char #define uint unsigned int sbit key1=P1^0; sbit key2=P1^1; uchar num=0; //共阴数码管七段码 uchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d, 0x07,0x7f,0x6f,0x77}; void Delay1ms(uint i) //1ms延时程序 {