Mistake With CPP File

Recently I tried to compile fig01_02.cpp with Kernel 2.2.20 on Linux
Mandrake 8.0.  I used "gcc fig01_02.cpp" and received the following
errors:

<user_account>/tmp/ccmeDWKS.o: In function `main':
<user_account>/tmp/ccmeDWKS.o(.text+0xf): undefined reference to
`cout'
<user_account>/tmp/ccmeDWKS.o(.text+0x14): undefined reference to
`ostream::operator<<(char const *)'collect2: ld returned 1 exit status

Why didn't it work?

I attached the file in question.

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Signed,
SoloCDM

// Fig. 1.2: fig01_02.cpp
// A first program in C++
#include <iostream.h>

int main()
{
	cout << "Welcome to C++!\n";

	return 0;   // indicate that program ended successfully
}