Author: Dann Corbit
Date: 13:48:54 02/14/00
Go up one level in this thread
On February 14, 2000 at 16:05:54, Tom Kerrigan wrote:
>On February 14, 2000 at 15:23:21, Daniel Clausen wrote:
>
>>1. You changed "int main()" to "void main()" for a reason unknown to me.
>> Afterall the first version is the correct one. :) (The Mac-Compiler gives
>> an error for "void main()" in strict-mode.
>
>Hmmm. I've never seen anything that says that main HAS to return an int, but I
>will change it back to int to make the compiler happy. =)
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;8) 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.
[snip]
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