Solaris

I'm just starting a 'serious' coding in UNIX, so what I need is to run a C code on UNIX, What do I have to install (app) prior to coding/running the code and how do I compile that code?
can I write my c code in UNIX or I need to have a visual studio for this?

You need to install a C/C++ compiler and headers plus library objects for it. Which compiler and how to install it really depends on your system -- OSX? AIX? BSD? Solaris? IRIX? HPUX? SCO? If Linux, what distro of Linux?

Anyway... Once installed, most UNIX C compilers are used the same way, though they may have different extensions. They can compile .c source files into .o object files with:

Code:

cc file.c -o file.o

..and can link one or several object files into a single executable file with:

Code:

cc file.o a.o b.o c.o -o executable_file

...which will run as a normal program, just ./executable_name.

actually I'm not quite familiar with UNIX systems ( OSX? AIX? BSD? Solaris? IRIX? HPUX? SCO), I'm using putty.

Putty is not UNIX, the same way your monitor is not your computer. Putty's a terminal emulator you use to talk to UNIX on some other computer. And we really do need to know what your system is to help you; they provide similar environments, but are managed very differently.

Since you have a shell login, try 'uname -a' and see what that prints.

here u go

Code:

SunOS omicron 5.8 Generic_117350-61 sun4u sparc SUNW,Sun-Fire-480R

any help with this?

Sorry, I somehow didn't see this.

I don't know how much about SunOS, I'd suggest having this thread moved to the Sun section where you'll more likely encounter posters that do. I do think Sun has their own proprietary compilers, for one thing, though gcc should be available as well.