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#include<reg52.h>
#include<intrins.h>
#define uint unsigned int
#define uchar unsigned char
uchar code table[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71};
uchar t,t_1,t_2;
sbit dula=P2^6;
sbit wela=P2^7;
uint num;
sbit temp=0xfe;
void delay(int z)
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
/*******************************¾ØÕó¼üÅì*****************************************/
uchar keyscan()
{
/**********************???******************************/
P3=0xfe;
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
delay(5);
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
temp=P3;
switch(temp)
{
case 0xee:num=0; display(0); berak;
case 0xde:num=1; display(1); berak;
case 0xbe:num=2; display(2); berak;
case 0x7e:num=3; display(3); berak;
}
while(temp!=0xf0)
{
temp=P3;
temp=temp&0xf0;
}
}
}
/**********************???*****************************/
P3=0xfd;
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
delay(5);
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
temp=P3;
switch(temp)
{
case 0xed:num=4; display(4);berak;
case 0xdd:num=5; display(5);berak;
case 0xbd:num=6; display(6);berak;
case 0x7d:num=7; display(7);berak;
}
while(temp!=0xf0)
{
temp=P3;
temp=temp&0xf0;
}
}
}
/**************************???****************************/
P3=0xfb;
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
delay(5);
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
temp=P3;
switch(temp)
{
case 0xeb:num=8; display(8); berak;
case 0xdb:num=9; display(9); berak;
case 0xbb:num=10; berak;
case 0x7b:num=11; berak;
}
while(temp!=0xf0)
{
temp=P3;
temp=temp&0xf0;
}
}
}
/*********************???*****************************/
P3=0xf7;
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
delay(5);
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
temp=P3;
switch(temp)
{
case 0xe7:num=12; berak;
case 0xd7:num=13; berak;
case 0xb7:num=14; berak;
case 0x77:num=15; berak;
}
while(temp!=0xf0)
{
temp=P3;
temp=temp&0xf0;
}
}
}
return num;
}
/******************************ÏÔê¾**************************************/
void display(uchar ee)
{
dula=1;
P0=table[ee];
dula=0;
P0=0xff;
wela=1;
P0=0xfe;
wela=0;
delay(1);
}
/*************************************Ö÷oˉêy***********************************/
void main()
{
wela=0;
dula=0;
while(1)
{
keyscan();
t_1=num;
keyscan();
t_2=num;
if(num<10)
{
keyscan();
if(num=10) t=t_1+t_2+2;
if(num=11) t=t_1-t_2;
if(num=12) t=(t_1+1)*(t_2+1);
if(num=13) t=(t_1+1)/(t_2+1);
}
}
錯誤：homework4.c(37): error C255: switch expression has illegal type
求大神解，switch中不能用sbit定義的嗎？那應(yīng)該怎么改呢
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