Discussion :

[Invité]

Bonjours, à tous,

Je vais commencer cette après-midi le language C et je bloque dès le départ sur la fonction Main.

J'ai la norme ISO/IEC 9899꞉1999 n1256 et ISO IEC 9899꞉201x n1570 sous les yeux qui sont toutes les 2 les tous derniers brouillons des normes définitives du C99 et C11 et elles indiquent ceci:

5.1.2.2.1 Program startup
1 The function called at program startup is named main. The implementation declares no
prototype for this function. It shall be defined with a return type of int and with no
parameters:
int main(void) { /* ... */ }
or with two parameters (referred to here as argc and argv, though any names may be
used, as they are local to the function in which they are declared):
int main(int argc, char *argv[]) { /* ... */ }
or equivalent;9) or in some other implementation-defined manner.
2 If they are declared, the parameters to the main function shall obey the following
constraints:
— The value of argc shall be nonnegative.
— argv[argc] shall be a null pointer.
— If the value of argc is greater than zero, the array members argv[0] through
argv[argc-1] inclusive shall contain pointers to strings, which are given
implementation-defined values by the host environment prior to program startup. The
intent is to supply to the program information determined prior to program startup
from elsewhere in the hosted environment. If the host environment is not capable of
supplying strings with letters in both uppercase and lowercase, the implementation
shall ensure that the strings are received in lowercase.
— If the value of argc is greater than zero, the string pointed to by argv[0]
represents the program name; argv[0][0] shall be the null character if the
program name is not available from the host environment. If the value of argc is
greater than one, the strings pointed to by argv[1] through argv[argc-1]
represent the program parameters.
— The parameters argc and argv and the strings pointed to by the argv array shall
be modifiable by the program, and retain their last-stored values between program
startup and program termination.

Or je vois un peu partout y compris dans mon livre intitulé
Le livre du C : Premier langage (Claude Delannoy) mais aussi ici Le C en 20 heures des fonctions Main qui semble ne pas respecter les normes C99/C11.
Quelques exemples (raccourci):
int main() {/*...*/} http://c.developpez.com/tutoriels/20...s/?page=page_2
void main() {/*...*/} http://www.exercices-corriges.com/20...l#.U29Ri00U9hF
int main(void) {/*...*/} (La bonne en principe ?)

Pourquoi ? Comment faut-il déclarer les fonctions Main ?
Merci d'avance.