Hello, Me.

If you want to display an integer to a console, use the printf function like so:

#include <stdio.h>
int main(int argc, char *argv[]) {
  int i=543;
  printf("i=%d",i);
  return 0;
}

If you are using C++, you also can use the cout function, though to me it is less intuitive:

#include <iostream>
int main(int argc, char *argv[]) {
  int k=404;
  cout << "k=" << k << endl;
  return 0;
}

If you want to print it to a bitmap in Allegro (such as the screen bitmap), you would do this:

int j=1234;
textprintf_ex(screen,font,0,0,makecol(255,255,255),-1,"j=%d",j);

As always, be sure to read the docs. Follow the links in the code snippets.

(Edited to include the C++ example.)

Beautiful work, Harry.

You can also use the sprintf function.

I've always been more of a fan of sprintf than printf, personally.

/* sprintf example */
#include <stdio.h>

int main()
{
  char buffer[50];
  int n, a = 5, b = 3;
  n = sprintf(buffer, "%d plus %d is %d", a, b, a + b);
  printf("[%s] is a %d char long string\n", buffer, n); // To output to console
  return 0;
}

Of course, instead of the printf function, I'd suggest using textprintf_ex, since Allegro doesn't play nice with the console (unless you're outputting some debug data).

The big strength of C++ ostreams is that you can just replace the stream without really touching the output code. For example, send a message to cout, cerr, a stringstream, a log file, even a custom 'null buffer' that just throws away the result, without changing the code inside the function that generates the message. Or you can send data from one stream to another, set up chains of filters and whatnot.
printf() is more intuitive, though. There's not much that keeps you from combining the two, btw:

cout << sprintf(mybuf, "Printing a random number: %i", rand()) << endl;

Thanks Harry, you did it for me.