Couldn't compile the simple "Hello World"

Applications Programming
1

So, this is my first C++ program under linux. My OS is Red Hat 8.0, and my codes are like following:

$vi hello.cpp

#include <iostream>
using namespace std;

int main()
{
cout << "Hello World!" << endl;
return 0;
}

$ g++ -o hello hello.cpp

the error message are:
hello.cpp: In function `int main()':
hello.cpp:4: `cout' undeclared (first use this function)
hello.cpp:4: (Each undeclared identifier is reported only once for each
function it appears in.)
hello.cpp:4: `endl' undeclared (first use this function)

It could run under M$ with VS 6.0. Can someone tell me what I did wrong here? Thanx.

2

Some ideas:

Instead of:
#include <iostream>

try either:
using namespace std;
or
#include <iostream.h> (deprecated)

Also, instead of cout << ... you can try std::cout << ...

3

Please don't double post. I deleted the second copy of this thread.

I tried your program with g++ on SunOS and it works for me. I'm not sure what to tell you. You might look at your compiler's docs and ensure that ansi features are enabled.

4

oombera 's idea was right. I changed <iostream> to <iosteam.h>, and it worked. Maybe it because the the default compile environment is C but not C++? Well, if I want to change to C++ as the default compile language, what should I do?

Perderabo: Sorry, I first posted it to the wrong place, after I copied and pasted, I forgot to delete the old one. Sorry about that.

Well, Thanks for everyone!