Simple Script causing error

Hey everyone. I just started learning C++ and I'm reading the tutorial here at cprogramming. I tried to use the script in one of the examples. Here is the source:

Code:

---

#include <iostream>

using namespace std;

int main()
{
  cout<<"HEY, you, I'm alive! Oh, and Hello World!\n";
  cin.get();

  return 1;
}

---

When I try to Compile this I get an error that says '[Warning] no newline at end of file'. I am using Dev-C++. What is wrong with this?

Some compilers prefer that your source files end with a newline character.

Ha that fixed it. Thanks LuckY :).

Really? And is this standard behaviour, or just pointless thoughtless laziness on the part of the compiler writers?

Hmm I just tried another one of the examples and I'm getting the same error. Here's the source.

Code:

---

#include <iostream>       

using namespace std;
               
int main()                            // Most important part of the program!
{
  int age;                            // Need a variable...
 
  cout<<"Please input your age: ";    // Asks for age
  cin>> age;                          // The input is put in age
  cin.ignore();                      // Throw away enter
  if ( age < 100 ) {                  // If the age is less than 100
    cout<<"You are pretty young!\n"; // Just to show you it works...
  }
  else if ( age == 100 ) {            // I use else just to show an example
    cout<<"You are old\n";          // Just to show you it works...
  }
  else {
    cout<<"You are really old\n";    // Executed if no other statement is
  }
  cin.get();
}

---

I tried adding a few more lines at the end, but I still get the error. [Warning]no newline at end of file.

Hmm I found the problem. It seems you can only add one new line at the end of the program . I was trying to add a couple, and that messes things up.

Quote:

---

Originally Posted by Hunter2

Really? And is this standard behaviour, or just pointless thoughtless laziness on the part of the compiler writers?

---

As far as I'm aware it is not a part of the C++ standard, if that's what you're asking. My guess is that it is included simply to warn programmers of potential problems.

Hello,

LuckY has a good point.

Code:

---

newline not last character in file
        Type: Warning -- Options: all
        Every non-empty source file and header must consist of complete lines.
        This diagnostic warns that the last line of a file did not end with a newline.

---

I believe that warning exists to avoid empty source files and make sure the file contains at least a newline.


- Stack Overflow

>> My guess is that it is included simply to warn programmers of potential problems.

or maybe the (unsophisticated) lexical scanner on some compilers expect it so that last line of code gets a line number associated with it?

the newline thing is supposedly a UNIX convention. the latest build of dev C++ for some reason seems to want to incorporate it - as if i really wanted all those redundant CLI msges in my IDE - I i did i would have just used MINGW.
Its annoying if nothing else. plus someimes your build prduces a "gmon.out" file. :rolleyes: