dip_sw 7seg + led display 0~15

 int led[]={14,15,16,17};

int seg7[]={2,3,4,5,6,7,8,9};

int dip_sw[]={13,12,11,10};

int weight[]={8,4,2,1};

int num;

int value;

char table_led[]=

{

  0x0,0x1,0x2,0x3,

  0x4,0x5,0x6,0x7,

  0x8,0xf9,0xfa,0xb,

  0xc,0xd,0xe,0xf

};

char table_7seg[]=

{

  0xc0,0xf9,0xa4,0xb0,

  0x99,0x92,0x82,0xf8,

  0x80,0x90,0x88,0x83,

  0Xc6,0xa1,0x86,0x8E

};

//--------------------------------------------------

void setup() 

{

  // put your setup code here, to run once:

  for(int i=0;i<4;i++)

  {

    pinMode(led[i],OUTPUT);

    digitalWrite(led[i],LOW);

  }

 for(int i=0;i<8;i++)

 {

  pinMode(seg7[i],OUTPUT);

 }

 for(int i=0;i<4;i++)

 {

  pinMode(dip_sw[i],INPUT);

  digitalWrite(dip_sw[i],HIGH);

 }

}

//---------------------------------------------------------

void tx1(byte data1)

{

  for(int j=0;j<8;j++)

  {

   if(data1%2==1)

   {

     digitalWrite(seg7[j],LOW);

   }

   else

   {

     digitalWrite(seg7[j],HIGH);

   }

   data1=data1/2;

  }

}

//---------------------------------------------------------------

void tx2(byte data2)//A0~A3只有四位而已

{

  for(int h=0;h<4;h++)//你寫8會錯，因為你並沒有給他8支腳位scan

  {

   if(data2%2==1)

   {

     digitalWrite(led[h],HIGH);//高電位led就亮

   }

   else

   {

     digitalWrite(led[h],LOW);

   }

   data2=data2/2;//16進制(電腦會自動轉十進制來算)用除2會當十進制

  }

}

//--------------------------------------------------------

void loop()

{

 num=0;

 for(int k=0;k<4;k++)

 {

  value=digitalRead(dip_sw[k]);

  if(value==HIGH)

    num=num+ weight[k];

 }

 tx1(table_7seg[num]);

 tx2(table_led[num]);

}