gcc can't find file

[DanWebb314]

I am new to Ubuntu Linux gcc. I have writen c++ programs for windows. I can't get off the ground with gcc. If I use gedit, do I store the hello.c in document? If so, why does:
gcc first.c -o first
not work. It can't find the file.

[ubix]

1. Is it C++ or C file; for C files you use gcc command, for C++ g++
2. Please post exactly the command you are using
3. Show us the output of ls -la in the directory where you are compiling; hopefully it is not too crowded.
4. Also tell us what is the error message

[Petrolea]

I am new to Ubuntu Linux gcc. I have writen c++ programs for windows. I can't get off the ground with gcc. If I use gedit, do I store the hello.c in document? If so, why does:
gcc first.c -o first
not work. It can't find the file.

You must run the command when you're in the same directory as the file. You probably used some IDE on Windows that took care of that.

[lisati]

Thread moved to Programming Talk.

Suppose you have the following c program saved in file hello.c:

#include <stdio.h>
int main(void)
     {
     printf("Hello world!\n");
     return 0;
     }

Assuming you've just saved the file, you would use something like this to compile it:

gcc hello.c -o hello

Assuming it compiles correctly, you'd then need to run it with something like this:

./hello

EDIT/Disclaimer: the code shown is not intended as an example of good programming technique; it is included for illustrative purposes only.

[|{urse]

you need to issue the command from the directory in which you saved your source file. Or specify the absolute path to the source.


Edit: D'oh, someone covered that above

[ubix]

Enter the following in terminal:

mkdir my-c-test
cd my-c-test
echo "int main(void){}" > test1.c
gcc test1.c -o test1
ls -l

You should now see something like:

-rwxr-xr-x 1 you you 8335 2011-12-22 20:10 test1
-rw-r--r-- 1 you you   17 2011-12-22 20:10 test1.c

[trent.josephsen]

EDIT/Disclaimer: the code shown is not intended as an example of good programming technique; it is included for illustrative purposes only.

That's for sure -- you used Whitesmiths!

[DanWebb314]

Thank you!
cd Documents
makes a difference. Now I have compiled several 'hello world' programs.

This question is just about solved.

Should this question start a new thread?

if i change "hello world" to "hello world\n", It does not like the escape sequence?

[Petrolea]

Thank you!
cd Documents
makes a difference. Now I have compiled several 'hello world' programs.

This question is just about solved.

Should this question start a new thread?

if i change "hello world" to "hello world\n", It does not like the escape sequence?

That would mean newline. If you want to actually write \n, you'll have to write \\n.

[DanWebb314]

That would mean newline. If you want to actually write \n, you'll have to write \\n.

Yes I want new line. Why does the escape sequence '\n' not work?