This is the best way to do it?

Projects Programming
1

Hi!
I try to do a function that he will return 3 value. This's woking, but it's the right way?
Thank

int h,m,s;
void GetTime(int & h, int & m, int & s);

void setup() {
// put your setup code here, to run once:
}

void loop() {
// put your main code here, to run repeatedly:
GetTime(h,m,s);
Serial.begin(115200);
Serial.println();
Serial.println();
Serial.print("H = ");
Serial.print(h);
delay(5000);
}

void GetTime(int & h, int & m, int & s){
h = 12;
m = 5;
s = 25;
return;
}

3

Thank for the answer. And if I don't set h,m,s as global variable, like this:

void GetTime(int & h, int & m, int & s);

void setup() {
// put your setup code here, to run once:
}

void loop() {
// put your main code here, to run repeatedly:
int h,m,s;
GetTime(h,m,s);
Serial.begin(115200);
Serial.print(h);
delay(5000);
}

void GetTime(int & h, int & m, int & s){
h = 12;
m = 5;
s = 25;
return;
}

but this mean I will declare/initalize h,m and s evey loop...

4

cfiset:
I try to do a function that he will return 3 value. This's working, but it's the right way?

Using a "structure" gives better encapsulation. It allows you to treat the three fields as a single unit.

Note: Since the time fields don't need to store values less than 0 or greater than 255 I use the 'byte' (unsigned char) type.

struct Time {
  byte hour;
  byte minute;
  byte second;
  };

  void setup() {
    // put your setup code here, to run once:
    Serial.begin(115200);
  }

  void loop() {
    struct Time localTime;

    // put your main code here, to run repeatedly:
    GetTime(localTime);

    Serial.print("hour = ");
    Serial.println(localTime.hour);
    Serial.print("minute = ");
    Serial.println(localTime.minute);
    Serial.print("second = ");
    Serial.println(localTime.second);

    Serial.println();
    Serial.println();

    delay(5000);
  }

  void GetTime(struct Time &time) {
    time.hour = 12;
    time.minute = 5;
    time.second = 25;
  }

The old-school way would be to pass a pointer instead of a reference:

  void GetTime(struct Time *time) {
    time->hour = 12;
    time->minute = 5;
    time->second = 25;
  }