51单片机一个开关控制两个程序

Question

当开关接高电平时，做霹雳灯，当接低电平时做奇偶灯变换，有没有人帮看一下代码有什么问题吗？```

#include <reg51.h>
#include <intrins.h>
#define uchar unsigned char
#define uint unsigned int
uchar tab[]={0x7e,0xbd,0xdb,0xe7,0xdb,0xbd};
sbit key=P0^7;
uchar a;
void delay(uint b)
{
uchar t;
while (b--)
{
for(t=0;t<120;t++);
}
}
void main()
{
unsigned char zt=0;
while(1)
{
if(key==1){zt=0;}
if(key==0){zt=1;}
switch(zt)
{
case 0:
P1=0x55;
while(1)
{
delay(500);
P1=crol(P1,1);
}
break;
case 1:
while(1)
{
for(a=0;a<6;a++)
{
P1=tab[a];
delay(500);
}
}
break;
}
}
}

```

Answer 1

这么改，供参考：

#include <reg51.h>
#include <intrins.h>
#define uchar unsigned char
#define uint  unsigned int
uchar tab[] = { 0x7e,0xbd,0xdb,0xe7,0xdb,0xbd };
sbit key = P0 ^ 7;
uchar a;
void delay(uint b)
{
    uchar t;
    while (b--)
    {
        for (t = 0; t < 120; t++);
    }
}
void main()
{
    unsigned char zt = 0;
    P1 = 0x55;
    while (1)
    {
        if (key == 0) { 
            delay(100);   //消抖
            if (key == 0) {
                zt = !zt; //状态翻转
                if (zt == 0) P1 = 0x55;
            }
            while (!key); //判断是否放开按键
        }
        switch (zt)
        {
        case 0:
            delay(500);
            P1 = crol(P1, 1);
            break;
        case 1:
            for (a = 0; a < 6; a++)
            {
                P1 = tab[a];
                delay(500);
            }
            break;
        }
    }
}