cant compile 'hello world'

[Max Destruction]

hi, i am brand new to programming.

i am working through the book 'Beginning Linux Programming'

i am having trouble compiling the first example: The text reads:

'Let’s start developing for Linux using C by writing, compiling, and running our first Linux program.
It might as well be that most-famous of all starting points, Hello World.
1. Here’s the source code for the file hello.c:
#include <stdio.h>
int main()
{
printf(“Hello World\n”);
exit(0);
}

2. Let’s compile, link, and run our program.
$ gcc -o hello hello.c '

__________________________________________________ _______

When I compile this I get:


gcc -o hello hello.c
hello.c: In function ‘main’:
hello.c:4: error: stray ‘\342’ in program
hello.c:4: error: stray ‘\200’ in program
hello.c:4: error: stray ‘\234’ in program
hello.c:4: error: ‘Hello’ undeclared (first use in this function)
hello.c:4: error: (Each undeclared identifier is reported only once
hello.c:4: error: for each function it appears in.)
hello.c:4: error: expected ‘)’ before ‘World’
hello.c:4: error: stray ‘\’ in program
hello.c:4: error: stray ‘\342’ in program
hello.c:4: error: stray ‘\200’ in program
hello.c:4: error: stray ‘\235’ in program
hello.c:5: warning: incompatible implicit declaration of built-in function ‘exit’

What am I doing wrong?

[lisati]

edit: never mind, dirt on laptop screen

[MadCow108]

these "stray" messages always mean you have some unsupported character in your file
in your case its:
“
use " (double quote) instead
this often happen when copy-pasting from bad formated tutorials

and you also have to include stdlib.h for the exit function
you could also just return 0; instead of exit(0); in the main which does the same

[Max Destruction]

hmmm. ok, I made the changed to talked about (as best i understood them)
I am getting errors still, albeit different ones.
this is my code


#include <stdlib.h>
#include <stdio.h>

int main()
{
printf("Hello World\n”);
exit(0);
}errors:



hello.c:6:12: warning: missing terminating " character
hello.c: In function ‘main’:
hello.c:6: error: missing terminating " character
hello.c:7: error: expected ‘)’ before ‘;’ token
hello.c:8: error: invalid use of void expression
hello.c:8: error: expected ‘;’ before ‘}’ token:(

I think I understand what the error is saying but I dont see how it is in the code.

[lisati]

Both the opening and closing quotes should be regular double quotes..... :)

[Max Destruction]

haha ok i got it - exit instead of return *slaps head*

thanks.

[Max Destruction]

Both the opening and closing quotes should be regular double quotes..... :)


isnt that what i had ...? i copy pasted the example from wikipedia and it worked:
which was:






#include <stdio.h>
int main(void)
{
printf("hello, world\n");
return 0;
}this code doesnt work:


#include <stdio.h>
int main()
{
printf("Hello World\n”);
exit(0);
}where is the difference, besides the exit/return? (t doesnt work with no brackets around 0 either)

[lisati]

On my screen the closing quotes look different in your second example.

[Max Destruction]

oh yes, i see. you are right. it's like a different sort of closing quote ... weird.

thanks a lot man.

[dragos2]

oh yes, i see. you are right. it's like a different sort of closing quote ... weird.

thanks a lot man.

At least for the Hello World you can write it by hand and not copy paste it, it will
spare a lot of time in the future :)

[Compyx]

Are you by any chance using a word processor (OO Writer/MS Word) to write your code in? I've seen word processors translate normal double quotes into 'fancier' quotes. Copying/pasting from the web or PDF-files is also a known source of incorrect quotes.

[Max Destruction]

Nah I was using gedit to write this. I did copy and paste it out of a pdf though. But it also turned out that wasn't the only problem. The reason i didnt pick up on it was because the syntax highlighting recognized as correct. It actually doesn't compile if I use exit instead of return.

[Compyx]

exit() is declared in stdlib.h, so an '#include <stdlib.h>' should fix that.

[Max Destruction]

ahhh k thanks