How to run/compile a c/c++ program in Ubuntu?

Hello,

It seems gcc cannot find your files. Are they listed when you run this command: ls in the same directory where you are running gcc?

 Dmitry,
                My *.c file is in the same directory where I am running gcc.Here is the example,

~$ls
                       Desktop N.C Projects Ram's folder
                       Examples N.C~ ramnath
~$ gcc -o N N.c
                        gcc: N.c: No such file or directory
                        gcc: no input files

Dear friend,
                Latter This took place did the following........

~$ gss n.c -o n.run
The program 'gss' is currently not installed. You can install it by typing:
sudo apt-get install libgss-dev
Make sure you have the 'universe' component enabled
bash: gss: command not found
~$ sudo apt-get install libgss-dev
Password:
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
  libgss0 libshishi0 shishi-common
Suggested packages:
  shishi
The following NEW packages will be installed:
  libgss-dev libgss0 libshishi0 shishi-common
0 upgraded, 4 newly installed, 0 to remove and 0 not upgraded.
Need to get 421kB of archives.
After unpacking 1249kB of additional disk space will be used.
Do you want to continue [Y/n]? y
Get:1 http://in.archive.ubuntu.com feisty/universe shishi-common 0.0.30-1 [90.1kB]
Get:2 http://in.archive.ubuntu.com feisty/universe libshishi0 0.0.30-1 [205kB]
Get:3 http://in.archive.ubuntu.com feisty/universe libgss0 0.0.18-1 [61.0kB]
Get:4 http://in.archive.ubuntu.com feisty/universe libgss-dev 0.0.18-1 [65.1kB]
Fetched 421kB in 4s (93.2kB/s)
Selecting previously deselected package shishi-common.
(Reading database ... ^[[5~119669 files and directories currently installed.)
Unpacking shishi-common (from .../shishi-common_0.0.30-1_all.deb) ...
Selecting previously deselected package libshishi0.
Unpacking libshishi0 (from .../libshishi0_0.0.30-1_i386.deb) ...
Selecting previously deselected package libgss0.
Unpacking libgss0 (from .../libgss0_0.0.18-1_i386.deb) ...
Selecting previously deselected package libgss-dev.
Unpacking libgss-dev (from .../libgss-dev_0.0.18-1_i386.deb) ...
Setting up shishi-common (0.0.30-1) ...
Setting up libshishi0 (0.0.30-1) ...

Setting up libgss0 (0.0.18-1) ...

Setting up libgss-dev (0.0.18-1) ...
ramnath@ramnath-desktop:~$ gss n.c -o n.run
gss: invalid option -- o
ramnath@ramnath-desktop:~$ gss n.c -o n.run
gss: invalid option -- o
ramnath@ramnath-desktop:~$ gss n.c n.run
gss: missing parameter
Try `gss --help' for more information.
gss 0.0.18

Command line interface to GSS, used to explain error codes.

Usage: gss [OPTIONS]...

  -h, --help Print help and exit
  -V, --version Print version and exit
  -m, --major=LONG Describe a `major status' error code vaue in plain text.
  -q, --quiet Silent operation (default=off)

WHAT SHOULD I DO?

Thanks a loooootttt1
its working but I have got another one to solve.
the header file is not been recognized , I know there fore that I have no library files, How can i include them?
see the example:

#include<stdio.h>
#include<conio.h>
int main()
{
 int a,b;
 clrscr();
 scanf("%d",&a);
 scanf("%d",&b);
 printf(" %d",a*b);
 getch();
}

 gcc n.c -o n.run
n.c:2:18: error: conio.h: No such file or directory

Indeed you have to install the base library (libc6-dev). You can do that directly or with the build-essential metapackage.

Sorry, rereading your question the problem is not stdio.h but conio.h, which is indeed not supported by gcc (if I remember it correctly it was a borland proprietary implementation not even iso compliant).
For which function do you need to use it, getch?
If so, you can consider using the getchar function (defined in stdio.h).

Thanks A lot for spending your precious time in helping me.
_________________________________________________________________
Palate Teasers: Straight from Master Chef!
http://content.msn.co.in/Lifestyle/Moreonlifestyle/LifestylePT_101106_1530.htm

Ramnath, this question appears to be still open. Could you please change the status to Solved? Thanks.

THANK A LOT FOR Cesare Tirabassi & Dmitry Mityugov!!!!!!!!!!!!

Thanks Cesare Tirabassi, that solved my question.

i used gcc test.c -o a
it compiled the "test.c" file n a "a" executable file is created.
now how can i run the file to see the output of the code ???

Type:

./a

or change permission of file
chmod 700 a

and run it
./a

Hope this helps

Instead change the permission of the file using
chmod 744 a
well it is recommended to generate a.out file
well now run it by typing
./a

do make sure the directory where the file is there

type ./a.out and there will be a output for sure