Instructions

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void digital_7(void) { // shows number 7
unsigned char j;
for(j=5;j<=7;j++)
digitalWrite(j,HIGH);
digitalWrite(dp,LOW);
for(j=8;j<=11;j++)
digitalWrite(j,LOW);
}
void digital_8(void) { // shows number 8
unsigned char j;
for(j=5;j<=11;j++)
digitalWrite(j,HIGH);
digitalWrite(dp,LOW);
}
void digital_9(void) { // shows number 9
unsigned char j;
digitalWrite(a,HIGH);
digitalWrite(b,HIGH);
digitalWrite(c,HIGH);
digitalWrite(d,HIGH);
digitalWrite(e, LOW);
digitalWrite(f,HIGH);
digitalWrite(g,HIGH);
digitalWrite(dp,LOW);
}
void setup() {
int i; // defines variable i
for(i=4;i<=11;i++)
pinMode(i,OUTPUT); // sets pin 5 to 11 as output
}
void loop() {
while(1){
digital_0(); // shows number 0
delay(1000); // waits 1 second
digital_1(); // shows number 1
delay(1000); // waits 1 second
digital_2(); // shows number 2
delay(1000); // waits 1 second
digital_3(); // shows number 3
delay(1000); // waits 1 second
digital_4(); // shows number 4