define a struct variable

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1

Hello friends, I'm struggling to create a variable "test" in the attached code.
I created a type named "t_denree" including many fields, and set a variable test. But when I want to assigne a value for one of the fields of my variable test using this instruction: "test.id = 0;" the compiler returns: ""test" does not name a type".

I do not see any mistakes in my definition of the type "t_denree" and of the variable "test".

Hope you can help me out !

Thanks a lot.

types_h.ino (510 Bytes)

2

nicox178:
Hello friends, I'm struggling to create a variable "test" in the attached code.
I created a type named "t_denree" including many fields, and set a variable test. But when I want to assigne a value for one of the fields of my variable test using this instruction: "test.id = 0;" the compiler returns: ""test" does not name a type".

I do not see any mistakes in my definition of the type "t_denree" and of the variable "test".

Hope you can help me out !

Thanks a lot.

you incorrectly declared the struct / use typedef.

This is how it should be IMHO:

(Compiles, not tested!)

typedef struct {
  char nom[20];
  int id;
  float quantite;
  float prix_kilo;
  float debit_nominal; //massique
  char date[12]; // J/M/AN
} t_denree ;

t_denree test{"pate", 0, 10, 5, 0.05, "01/02/2020"}; //this is how you would initialise 'test'

void setup() {

  Serial.begin(115200);
  //if you wanted to initialise 'test' inside 'setup()'
  //test.nom = "pate"
  //test.id = 0;
  //test.quantite = 10;
  //test.prix_kilo = 5;
  //test.debit_nominal = 0,05;
  //test.date = "01/02/2020";

  Serial.print("nom: ");
  Serial.println(test.nom);
  Serial.print("id: ");
  Serial.println(test.id);
  Serial.print("quantite: ");
  Serial.println(test.quantite, 2);
  Serial.print("prix_kilo: ");
  Serial.println(test.prix_kilo, 2);
  Serial.print("debit_nominal: ");
  Serial.println(test.debit_nominal);
  Serial.print("date: ");
  Serial.println(test.date);
}

void loop() {

}

hope that helps....

3

(most of this is pointed out in the previous reply)

You cannot have an assignment outside of a function.

If you want to initialize the structure, you can do this:

t_denree test = {"pate", 0, 10, 5, 0.05, "01/02/2020"};

There is a problem with your declaration of the struct, nom and date are declared as char, which is a single character. Either declare those variables as char * or as char arrays if you want to store a string of characters.

Print will not work with an entire struct, you will have to print the individual elements of the array. Printf is not implemented on the Arduino.

4

Thank you very much for your help ! It solved my problem