iam a newbie in c\c++ ( iam newbie in everthing if u think so :D)
and i tried to compile that program :-

#include<stdio>
main ()
{
printf("hi, iam here\n Iwill 'Learn' coding with C\n");
return0;
}

when i compiled it with
gcc -o pro1 pro1.c
it gave me tat error :-
pro1.c:1:16: stdio: No such file or directory
pro1.c: In function `main':
pro1.c:5: `return0' undeclared (first use in this function)
pro1.c:5: (Each undeclared identifier is reported only once
pro1.c:5: for each function it appears in.)

so?
:D

1. its stdio.h
2. its "return 0"
3. if you're returning 0, then "int main()" to specify return type of main().

thanx yya basha and sorry for annoying:D

u can write

void main () instead of int main ()

when using the void u won`t need to return 0 at the end of the function


but i don`t know if this stabdard or not

the prof at the lect. she use to use int main and return 0


with the mo3eed it was always void

about the header.h

i think if u put .h u will get warning during the compilation - but it will go on - since they used to put the extention of the header file in old versions of compiler - wa Allahu a3lam -

:)

Originally posted by ^3aFrEt^
u can write

void main () instead of int main ()

when using the void u won`t need to return 0 at the end of the function


but i don`t know if this stabdard or not

the prof at the lect. she use to use int main and return 0


with the mo3eed it was always void

about the header.h

i think if u put .h u will get warning during the compilation - but it will go on - since they used to put the extention of the header file in old versions of compiler - wa Allahu a3lam -

:)


#include <stdio.h>
int main()
{
printf("Microcrap is crap!\n");

return 0;
}


3afreet, You are mixing C and C++
in C
it's stdio.h
in C++ it's iostream "not even stdio"
C --> #include <stdio.h>
C++ -->

#include <iostream>

int main()
{
using std::io;
cout << "Microcrap is crap!" << endl;
return 0;
}

oppppss


ma3lesh el gahel amma yefty ba2a :)

but there is something stdiolib.h or sdio.h in c++ too


anyway i`m sorry again :)

Originally posted by ^3aFrEt^
u can write

void main () instead of int main ()

when using the void u won`t need to return 0 at the end of the function


but i don`t know if this stabdard or not

the prof at the lect. she use to use int main and return 0


with the mo3eed it was always void

about the header.h

i think if u put .h u will get warning during the compilation - but it will go on - since they used to put the extention of the header file in old versions of compiler - wa Allahu a3lam -

:)

you don't want to specify a void return type for main; nasty windows development habit.

Some of us console freaks actually *do* check return values for executed programs.

an errorlevel or a return value is a way executables use to report their status to the calling program when they exit. A calling program is either shell, or another program; php interpreter,perl ...etc.

a return value of 0 is used to indicate success
any other value is used to indicate failure.

In C; if a function does not have an explicitly specified return value; it is assumed to be of type int. So both of main() and int main() are equal from C point of view. BTW gcc raises several warnings (with -Wall option):
&nbsp&nbsp&nbsp - if u use main() and u do not return a value -> warning: control reaches end of non-void function
&nbsp&nbsp&nbsp - if u use main() and u return a value -> warning: return type defaults to `int'
&nbsp&nbsp&nbsp - if u use int main() and u return a value -> doesnt return any warnings

Some programs use error levels to indicate several situations. But this is a program dependent.

the C++ ANSI/ISO standard states that main has to return an int.
so void main() is not valid C++.

if you want to use standard C library calls then include the headers this way

#include <cstdio>

the math header would be <cmath>, the time header would be <ctime> etc.

this is very important since the <c*> headers inform the compiler that these files include C not C++ code.

in general it is not recommended that you use C IO functions in your C++ code, it'll even perform better than C since printf is an interpreter that the format of the print out at run time, while the iostream objects does most binding at compile time. (but I have to admit that the iostream objects are quite large).

make sure you learn C++ from a modern book, there has been some changes in the language 8 yars ago but compilers and book writers have been slow on catching up.

cheers,
Alaa