设计单片机与4个独立按键k1~k4及8个LED指示灯的一个独立式键盘，控制LED指示灯亮与灭，实现按下k1键，8个LED正向（由上至下）流水点亮；按下k2键，8个LED反向（由下而上）流水点亮；按下k3键，高、低4个LED交替点亮；按下k4键，8个LED闪烁点亮的代码

### 回答1：
我理解了你的问题，下面是设计单片机与4个独立按键k1~k4及8个LED指示灯的一个独立式键盘，控制LED指示灯亮与灭，实现按下k1键，8个LED正向（由上至下）流水点亮；按下k2键，8个LED反向（由下而上）流水点亮；按下k3键，高、低4个LED交替点亮；按下k4键，8个LED闪烁点亮的代码：

#include<reg52.h>

sbit K1=P3^0;   //K1按键
sbit K2=P3^1;   //K2按键
sbit K3=P3^2;   //K3按键
sbit K4=P3^3;   //K4按键

sbit LED1=P1^0;  //LED1
sbit LED2=P1^1;  //LED2
sbit LED3=P1^2;  //LED3
sbit LED4=P1^3;  //LED4
sbit LED5=P1^4;  //LED5
sbit LED6=P1^5;  //LED6
sbit LED7=P1^6;  //LED7
sbit LED8=P1^7;  //LED8

void delay(int t);
void light1();   //8个LED正向流水点亮
void light2();   //8个LED反向流水点亮
void light3();   //高低4个LED交替点亮
void light4();   //8个LED闪烁点亮

void main(){
    while(1){
        if(K1==0){
            light1();
        }
        if(K2==0){
            light2();
        }
        if(K3==0){
            light3();
        }
        if(K4==0){
            light4();
        }
    }
}

void delay(int t){
    int i,j;
    for(i=0;i<t;i++)
        for(j=0;j<121;j++);
}

void light1(){
    int i;
    for(i=1;i<=8;i++){
        switch(i){
            case 1:
                LED1=1; break;
            case 2:
                LED2=1; break;
            case 3:
                LED3=1; break;
            case 4:
                LED4=1; break;
            case 5:
                LED5=1; break;
            case 6:
                LED6=1; break;
            case 7:
                LED7=1; break;
            case 8:
                LED8=1; break;
        }
        delay(100);
        switch(i){
            case 1:
                LED1=0; break;
            case 2:
                LED2=0; break;
            case 3:
                LED3=0; break;
            case 4:
                LED4=0; break;
            case 5:
                LED5=0; break;
            case 6:
                LED6=0; break;
            case 7:
                LED7=0; break;
            case 8:
                LED8=0; break;
        }
    }
}

void light2(){
    int i;
    for(i=8;i>=1;i--){
        switch(i){
            case 1:
                LED1=1; break;
            case 2:
                LED2=1; break;
            case 3:
                LED3=1; break;
            case 4:
                LED4=1; break;
            case 5:
                LED5=1; break;
            case 6:
                LED6=1; break;
            case 7:
                LED7=1; break;
            case 8:
                LED8=1; break;
        }
        delay(100);
        switch(i){
            case 1:
                LED1=0; break;
            case 2:
                LED2=0; break;
            case 3:
                LED3=0; break;
            case 4:
                LED4=0; break;
            case 5:
                LED5=0; break;
            case 6:
                LED6=0; break;
            case 7:
                LED7=0; break;
            case 8:
                LED8=0; break;
        }
    }
}

void light3(){
    int i;
    for(i=1;i<=4;i++){
        LED1=1;
        LED5=1;
        delay(100);
        LED1=0;
        LED5=0;
        delay(100);
        LED2=1;
        LED6=1;
        delay(100);
        LED2=0;
        LED6=0;
        delay(100);
        LED3=1;
        LED7=1;
        delay(100);
        LED3=0;
        LED7=0;
        delay(100);
        LED4=1;
        LED8=1;
        delay(100);
        LED4=0;
        LED8=0;
        delay(100);
    }
}

void light4(){
    int i;
    for(i=1;i<=5;i++){
        LED1=1;
        LED2=1;
        LED3=1;
        LED4=1;
        LED5=1;
        LED6=1;
        LED7=1;
        LED8=1;
        delay(100);
        LED1=0;
        LED2=0;
        LED3=0;
        LED4=0;
        LED5=0;
        LED6=0;
        LED7=0;
        LED8=0;
        delay(100);
    }
}

该代码使用了单片机的GPIO控制LED指示灯的亮与灭，并通过4个独立按键控制LED的流水、闪烁等效果。

### 回答2：
设计一个控制LED指示灯亮与灭的独立式键盘需要使用一个单片机。以下是一个可能的实现方案的代码：

#include<reg52.h>
#define uchar unsigned char
uchar code table[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f}; // 位选对应数码管需要显示数字的编码

sbit k1 = P1^0; // 按键k1
sbit k2 = P1^1; // 按键k2
sbit k3 = P1^2; // 按键k3
sbit k4 = P1^3; // 按键k4

sbit led1 = P2^0; // LED1
sbit led2 = P2^1; // LED2
sbit led3 = P2^2; // LED3
sbit led4 = P2^3; // LED4
sbit led5 = P2^4; // LED5
sbit led6 = P2^5; // LED6
sbit led7 = P2^6; // LED7
sbit led8 = P2^7; // LED8

void delay(unsigned int x) // 延时函数
{
    unsigned int i,j;
    for(i=x;i>0;i--)
        for(j=110;j>0;j--);
}

void main()
{
    while(1)
    {
        if(k1 == 0)
        {
            delay(10);
            if(k1 == 0)
            {
                while(!k1)
                {
                    led1=0;
                    delay(100);
                    led2=0;
                    delay(100);
                    led3=0;
                    delay(100);
                    led4=0;
                    delay(100);
                    led5=0;
                    delay(100);
                    led6=0;
                    delay(100);
                    led7=0;
                    delay(100);
                    led8=0;
                    delay(100);
					led1=1;
                    delay(100);
                    led2=1;
                    delay(100);
                    led3=1;
                    delay(100);
                    led4=1;
                    delay(100);
                    led5=1;
                    delay(100);
                    led6=1;
                    delay(100);
                    led7=1;
                    delay(100);
                    led8=1;
                    delay(100);
                }
            }
        }

        if(k2 == 0)
        {
            delay(10);
            if(k2 == 0)
            {
                while(!k2)
                {
                    led8=0;
                    delay(100);
                    led7=0;
                    delay(100);
                    led6=0;
                    delay(100);
                    led5=0;
                    delay(100);
                    led4=0;
                    delay(100);
                    led3=0;
                    delay(100);
                    led2=0;
                    delay(100);
                    led1=0;
                    delay(100);
					led8=1;
                    delay(100);
                    led7=1;
                    delay(100);
                    led6=1;
                    delay(100);
                    led5=1;
                    delay(100);
                    led4=1;
                    delay(100);
                    led3=1;
                    delay(100);
                    led2=1;
                    delay(100);
                    led1=1;
                    delay(100);
                }
            }
        }

        if(k3 == 0)
        {
            delay(10);
            if(k3 == 0)
            {
                while(!k3)
                {
                    led1=0;
                    led2=0;
                    led3=0;
                    led4=0;
                    delay(1000);
                    led1=1;
                    led2=1;
                    led3=1;
                    led4=1;
                    delay(1000);
                }
            }
        }

        if(k4 == 0)
        {
            delay(10);
            if(k4 == 0)
            {
                while(!k4)
                {
                    led1 = ~led1;
                    led2 = ~led2;
                    led3 = ~led3;
                    led4 = ~led4;
                    led5 = ~led5;
                    led6 = ~led6;
                    led7 = ~led7;
                    led8 = ~led8;
                    delay(100);
                }
            }
        }
    }
}

这个代码使用4个按键k1~k4和8个LED指示灯来实现各种控制功能：按下k1键，8个LED从上到下流水点亮；按下k2键，8个LED从下到上流水点亮；按下k3键，高低4个LED交替点亮；按下k4键，8个LED闪烁点亮。根据实际需要，可以自行调整代码中的延时时间来控制LED灯的亮灭频率。

### 回答3：
以下是设计单片机与4个独立按键k1~k4及8个LED指示灯的一个独立式键盘，实现不同功能的代码：

#include <reg51.h>

sbit K1 = P1^0;   // 定义按键K1连接的引脚
sbit K2 = P1^1;   // 定义按键K2连接的引脚
sbit K3 = P1^2;   // 定义按键K3连接的引脚
sbit K4 = P1^3;   // 定义按键K4连接的引脚

sbit LED1 = P2^0;  // 定义LED1连接的引脚
sbit LED2 = P2^1;  // 定义LED2连接的引脚
sbit LED3 = P2^2;  // 定义LED3连接的引脚
sbit LED4 = P2^3;  // 定义LED4连接的引脚
sbit LED5 = P2^4;  // 定义LED5连接的引脚
sbit LED6 = P2^5;  // 定义LED6连接的引脚
sbit LED7 = P2^6;  // 定义LED7连接的引脚
sbit LED8 = P2^7;  // 定义LED8连接的引脚

void delay(unsigned int ms)  // 定义延时函数
{
    unsigned int i, j;
    for(i=0; i<ms; i++)
    {
        for(j=0; j<110; j++);
    }
}

void main()
{
    K1 = 1;   // 设置按键K1为上拉输入
    K2 = 1;   // 设置按键K2为上拉输入
    K3 = 1;   // 设置按键K3为上拉输入
    K4 = 1;   // 设置按键K4为上拉输入

    while(1)
    {
        if(K1 == 0)   // 检测到按键K1按下
        {
            LED1 = 1;
            delay(100);
            LED2 = 1;
            delay(100);
            LED3 = 1;
            delay(100);
            LED4 = 1;
            delay(100);
            LED5 = 1;
            delay(100);
            LED6 = 1;
            delay(100);
            LED7 = 1;
            delay(100);
            LED8 = 1;
            delay(100);
        }
        else if(K2 == 0)   // 检测到按键K2按下
        {
            LED8 = 1;
            delay(100);
            LED7 = 1;
            delay(100);
            LED6 = 1;
            delay(100);
            LED5 = 1;
            delay(100);
            LED4 = 1;
            delay(100);
            LED3 = 1;
            delay(100);
            LED2 = 1;
            delay(100);
            LED1 = 1;
            delay(100);
        }
        else if(K3 == 0)   // 检测到按键K3按下
        {
            LED1 = 1;
            LED5 = 1;
            delay(100);
            LED1 = 0;
            LED5 = 0;
            delay(100);
            LED2 = 1;
            LED6 = 1;
            delay(100);
            LED2 = 0;
            LED6 = 0;
            delay(100);
            LED3 = 1;
            LED7 = 1;
            delay(100);
            LED3 = 0;
            LED7 = 0;
            delay(100);
            LED4 = 1;
            LED8 = 1;
            delay(100);
            LED4 = 0;
            LED8 = 0;
            delay(100);
        }
        else if(K4 == 0)   // 检测到按键K4按下
        {
            LED1 = 1;
            LED2 = 1;
            LED3 = 1;
            LED4 = 1;
            LED5 = 1;
            LED6 = 1;
            LED7 = 1;
            LED8 = 1;
            delay(100);
            LED1 = 0;
            LED2 = 0;
            LED3 = 0;
            LED4 = 0;
            LED5 = 0;
            LED6 = 0;
            LED7 = 0;
            LED8 = 0;
            delay(100);
        }
        else
        {
            LED1 = 0;
            LED2 = 0;
            LED3 = 0;
            LED4 = 0;
            LED5 = 0;
            LED6 = 0;
            LED7 = 0;
            LED8 = 0;
        }
    }
}

上述代码实现了单片机与4个独立按键k1~k4及8个LED指示灯的一个独立式键盘。按下k1键，8个LED正向（由上至下）流水点亮；按下k2键，8个LED反向（由下而上）流水点亮；按下k3键，高、低4个LED交替点亮；按下k4键，8个LED闪烁点亮。