Hello world NOT WORKING?! (solved)

[alkatran]

ok, heres the code, im sure uve all seen it b4...

#include <iostream>

int main()
{
std::cout << "Hello World!\n";
return 0;
}

When i run the program... nothing happens... isn't it supposed to display hello world to my screen???

(simplest program and i can't get it right )


It was just the window disppearing before i could even see it, thanks

[purusingh]

either you have to use iostream.h or if you are using iostream

you have to write
using namespace std...

[Memnoch1207]

#include <iostream>

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

try removing the
std::
and use the code above

[abdul]

If you mean that the screen just closes after about a second, try taking some input before closing like this:

#include <iostream>

int main()
{
int i;   
cout << "Hello World!\n";
cin>>i;
   return 0;
} 

[Zaei]

When you #include <iostream>, you must either include the line "using namespace std;", the lines "using std::<object here>;", or prefix all standard object names with "std::". Here is the hello world program with all three options:

#include <iostream>
using namespace std;

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

#include <iostream>
using std::cout;

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

#include <iostream>

int main()
{
   std::cout << "Hello World!\n"; 
   return 0;
}

abdul is also correct. If the window simply flashes on and off screen again, try adding an input call like he did.

Z.

[MoMad]

also, try flushing the buffer.

cout << "blah"; will stay in the buffer untill you flush the buffer into the screen. you have to use endl to flush the buffer or the function flush.

try:

#include <iostream>

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

Notice the endl to finish the line, it does more than just add a '\n' at the end. It also flushes the buffer.

Regards,
MoMad