Unable to compile simple c program in Linux Mint 15

Question

I am a Linux Mint 15 User.
i wanted to write simple program in C.
Below is my code.(hw.c)

#include<stdio.h>
#include<conio.h>
int main()
{
    printf("Hello World");
}

But, when i try to compile it with gcc

gcc -o hw hw.c

it gives me an error

hw.c:1:18: fatal error: stdio.h: No such file or directory
compilation terminated.

I googled and found some solutions which say to install build-essential
and tried to install it

sudo apt-get install build-essintial

but it gives an error again. The error is

    Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 build-essential : Depends: libc6-dev but it is not going to be installed or
                            libc-dev
                   Depends: g++ (>= 4:4.4.3) but it is not going to be installed
                   Depends: dpkg-dev (>= 1.13.5) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

So what is wrong? What is the problem?
How to solve it?

PS. The result of locate stdio.h is

/usr/lib/perl/5.14.2/CORE/nostdio.h
/usr/lib/syslinux/com32/include/stdio.h

Answer 1

I was having the same problem, and simply installed the g++ package and that fixed the missing include file.

sudo apt-get install g++