//A-7,B-6,C-5,D-10,E-11,F-8,G-9,DP-4
#define PA 7
#define PB 6
#define PC 5
#define PD 10
#define PE 11
#define PF 8
#define PG 9
#define DP 4

void digital_show(int num){
  //num:0--9
  if(num<0) num=0;
  if(num>9) num=9;

  //统一让所有的笔端都先灭掉
  for(int i=4;i<=11;i++)
    digitalWrite(i, LOW);

  switch(num){
    case 0:
      digitalWrite(PA, HIGH);
      digitalWrite(PB, HIGH);
      digitalWrite(PC, HIGH);
      digitalWrite(PD, HIGH);
      digitalWrite(PE, HIGH);
      digitalWrite(PF, HIGH);      
      break;
    case 1:
      digitalWrite(PB, HIGH);
      digitalWrite(PC, HIGH);
      break;
    case 2:
      digitalWrite(PA, HIGH);
      digitalWrite(PB, HIGH);
      digitalWrite(PD, HIGH);
      digitalWrite(PE, HIGH);
      digitalWrite(PG, HIGH); 
      break;
    case 3:
      digitalWrite(PA, HIGH);
      digitalWrite(PB, HIGH);
      digitalWrite(PD, HIGH);
      digitalWrite(PC, HIGH);
      digitalWrite(PG, HIGH);
      break;
    case 4:
      digitalWrite(PF, HIGH);
      digitalWrite(PB, HIGH);
      digitalWrite(PC, HIGH);
      digitalWrite(PG, HIGH);
      break;
    case 5:
      digitalWrite(PA, HIGH);
      digitalWrite(PF, HIGH);
      digitalWrite(PD, HIGH);
      digitalWrite(PC, HIGH);
      digitalWrite(PG, HIGH);
      break;
    case 6:
      digitalWrite(PA, HIGH);
      digitalWrite(PE, HIGH);
      digitalWrite(PD, HIGH);
      digitalWrite(PC, HIGH);
      digitalWrite(PG, HIGH);
      digitalWrite(PF, HIGH);
      break;
    case 7:
      digitalWrite(PA, HIGH);
      digitalWrite(PB, HIGH);
      digitalWrite(PC, HIGH);
      break;
    case 8:
      digitalWrite(PA, HIGH);
      digitalWrite(PB, HIGH);
      digitalWrite(PD, HIGH);
      digitalWrite(PC, HIGH);
      digitalWrite(PG, HIGH);
      digitalWrite(PE, HIGH);
      digitalWrite(PF, HIGH);
      break;
    case 9:
      digitalWrite(PA, HIGH);
      digitalWrite(PB, HIGH);
      digitalWrite(PD, HIGH);
      digitalWrite(PC, HIGH);
      digitalWrite(PG, HIGH);
      digitalWrite(PF, HIGH);
      break;
  }

}


//A-7,B-6,C-5,D-10,E-11,F-8,G-9,DP-4
void setup() {
  // put your setup code here, to run once:
  for(int i=4;i<=11;i++)
  {
    pinMode(i, OUTPUT);
  } 
  pinMode(12,OUTPUT);
  pinMode(3,OUTPUT);
  pinMode(1, INPUT);
  pinMode(2, INPUT);
  //设置为输入引脚
}
int buttonState0=0;
int buttonState=0; //用于存储按键的状态
int keyflag=0;
int keyflag0=0;
int keyflag1=0;
int keyflag2=0;
void loop() {
  // put your main code here, to run repeatedly:
  
  buttonState = digitalRead(2);
  buttonState0 = digitalRead(1);  
  //计数
  if(buttonState0==HIGH){
    keyflag0++;
    delay(100);
  }
  if(keyflag0>1){
    keyflag0=0;
  }
  if(keyflag0==0){
    digitalWrite(12,HIGH);
    if(buttonState==HIGH){ 
    keyflag++;
    delay(100);
  }
  if(keyflag>9){
    keyflag=0; 
  }
    digital_show(keyflag);
    delay(150);
  }//功能1
  if(keyflag0==1){
    digitalWrite(3,HIGH); 
  if(buttonState==HIGH){
    keyflag1++;
    delay(100);
  }
  if(keyflag1>1){
    keyflag1=0;
  }
  if(keyflag1==1){
  for(keyflag;keyflag2>=0,keyflag1=1;keyflag--){
  digital_show(keyflag);
  delay(400);
  }
  }
if(keyflag1==0){
    keyflag==keyflag;
    digital_show(keyflag);
  }
  }
}