按下个矩阵键盘依次在数码管上显示的平方如按下第一个显示第二个显示

1、按下16个矩阵键盘依次在数码管上显示1-16的平方。如按下第一个显示1，第二个显示4.Proteus仿真时，用的是元件库自带的矩阵键盘，分别代表1-16，仿真图如下：#include#define uint unsigned int#define uchar unsigned charvoid init();/初始化子程序void delay(uint);/延时子程序void display(uint);/显示子程序uint keyscan();/按键扫描子程序uchar code table=0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,

2、0x77,0x7c,0x39,0x5e,0x79,0x71;uchar temp;uint num;void main()init();while(1)display(keyscan();void init()num=0;P2=0;P1=0xff;void delay(uint ms)uint x,y;for(x=ms;x0;x-)for(y=110;y0;y-);void display(uint a)uchar bai,ge,shi;if(a=0)P2=0;P1=0xff;elseif(a10)P2=tablea;P1=0xfe;else if(a100)shi=a/10;ge=a%10;

3、P2=tableshi;P1=0xfe;delay(1);P1=0xff;P2=tablege;P1=0xfd;delay(1);P1=0xff;else if(a1000)bai=a/100;shi=a%100/10;ge=a%10;P2=tablebai;P1=0xfe;delay(1);P1=0xff;P2=tableshi;P1=0xfd;delay(1);P1=0xff;P2=tablege;P1=0xfb;delay(1);P1=0xff;uint keyscan()P3=0xfe;temp=P3;if(temp!=0xfe)delay(5);temp=P3;if(temp!=0x

4、fe)switch(temp)case 0xee:num=1;break;case 0xde:num=4;break;case 0xbe:num=9;break;case 0x7e:num=16;break;while(temp!=0xfe)temp=P3;P3=0xfd;temp=P3;if(temp!=0xfd)delay(5);temp=P3;if(temp!=0xfd)switch(temp)case 0xed:num=25;break;case 0xdd:num=36;break;case 0xbd:num=49;break;case 0x7d:num=64;break;while(

5、temp!=0xfd)temp=P3;P3=0xfb;temp=P3;if(temp!=0xfb)delay(5);temp=P3;if(temp!=0xfb)switch(temp)case 0xeb:num=81;break;case 0xdb:num=100;break;case 0xbb:num=121;break;case 0x7b:num=124;break;while(temp!=0xfb)temp=P3;P3=0xf7;temp=P3;if(temp!=0xf7)delay(5);temp=P3;if(temp!=0xf7)switch(temp)case 0xe7:num=169;break;case 0xd7:num=196;break;case