Could I have some guidance on this problem?

Projects Programming
1

The problem set by my worksheet asks us to devise a program using Arduino Uno with limited function use i.e. no if statements and such only ints and parseints. This is my code so far:

int totalHrs;
int totalMinutes;
int totalSeconds;
int swimHours;
int swimMinutes;
int swimSeconds;
int bikeHours;
int bikeMinutes;
int bikeSeconds;
int runHours;
int runMinutes;
int runSeconds;

void setup() {
// put your setup code here, to run once:
Serial.begin(9600);

Serial.println("Please enter the number of hours for the swim");
while (!Serial.available()) {
//wait for the user to enter a value
;
}
swimHours = Serial.parseInt();
Serial.println("Please enter the number of minutes for the swim");
while (!Serial.available()) {
//wait for the user to enter a value
;
}
swimMinutes = Serial.parseInt();
Serial.println("Please enter the number of seconds for the swim");
while (!Serial.available()) {
//wait for the user to enter a value
;
}
swimSeconds = Serial.parseInt();

Serial.println("Please enter the number of hours for the bike");
while (!Serial.available()) {
//wait for the user to enter a value
;
}
bikeHours = Serial.parseInt();
Serial.println("Please enter the number of minutes for the bike");
while (!Serial.available()) {
//wait for the user to enter a value
;
}

bikeMinutes = Serial.parseInt();
Serial.println("Please enter the number of seconds for the bike");
while (!Serial.available()) {
//wait for the user to enter a value
;
}
bikeSeconds = Serial.parseInt();

Serial.println("Please enter the number of hours for the running");
while (!Serial.available()) {
//wait for the user to enter a value
;
}
runHours = Serial.parseInt();
Serial.println("Please enter the number of minutes for the running");
while (!Serial.available()) {
//wait for the user to enter a value
;
}
runMinutes = Serial.parseInt();
Serial.println("Please enter the number of seconds for the running");
while (!Serial.available()) {
//wait for the user to enter a value
;
}
runSeconds = Serial.parseInt();

totalHrs = swimHours + bikeHours + runHours;
Serial.print(totalHrs);
Serial.print("hr");
totalMinutes = swimMinutes + bikeMinutes + runMinutes;
Serial.print(totalMinutes % 60);
Serial.print("min");
totalSeconds = swimSeconds + bikeSeconds + runSeconds;
Serial.print(totalSeconds);
Serial.print("sec");

}

void loop() {
// put your main code here, to run repeatedly:

}

At the moment the calculations work as intended, but now I want it to convert and carry over to the next column for example 0hr90min0sec -> 1hr30min0sec.

3

Using Delta_G suggestion, this begs for a function:

#define SWIM      0
#define BIKE      1
#define RUN       2

   // your code 

void loop()
{
    int sSwim;
    int sBike;
    int sRun;

   sSwim = GetSeconds(SWIM);
   sBike = GetSeconds(BIKE);
   sRun  = GetSeconds(RUN);
   // ...whatever...
}

int GetSeconds(int which)
{
    char buff[9];
    int charsRead;

    Serial.print("Enter total seconds for ");
    switch (which) {
      case SWIM:
         Serial.print("swim");
         break;
     case BIKE:
         Serial.print("bike");
         break;
     case RUN:
         Serial.print("run");
         break;
    }
    while (1) {
       if (Serial.available() > 0) {
          charsRead = Serial.readBytesUntil('\n', buff, sizeof(buff) - 1);  
          buff[charsRead] = '\0';
          return atoi(buff);
       }
    }
}

You could replace the Serial code in the while loop and use parseInt() if you want.

4

Ok it works now thanks Delta G, We didn't cover functions therefore couldn't use them for the sake of building a solution. As for For loops are concerned, is there a way of having the loop iterate over an array that stores user input, but have only one while loop for waiting on the user to input a value each time, with your answer please give a solution it would help even if it has functions to handle input and the correct output I.e. Swim: xhrs xmins xsecs
Bike: xhrs xmins xsecs
Runtime: xhrs xmins xsecs
Total: xhrs xmins xsecs
Where x indicates an integer value
Should there be some constants in there too? I can't go beyond what I've learnt so far so whatever functions the latter posted I have no clue what that does.

5

We didn't cover functions therefore couldn't use them for the sake of building a solution.

Why not? Is it not OK to learn on your own?

6

adt22:
i.e. no if statements and such only ints and parseints.

How is it possible to write useful code without decision making with IF etc?

And parseInt() is a blocking function and is best avoided. See Serial Input Basics

...R