Thread: Simple while loop - Windows 7

I am learning C using C for dummies 2nd Edition. I'm using codeblocks 10.05 with mingw (GCC) on Windows 7 Ultimate (64bit).

When I compile and run the code below on Windows XP everything works as expected and I can input from the keyboard fine and the loop does not exist until I press ~ followed by Return.

Unfortunately in Windows 7 running the code as a normal user or as administrator it, appears to, just totally ignore the while loop, prints the other messages to screen and exits the program.

Is there a problem with this code on Windows 7?

Code:

#include <stdio.h>

int main()
{
   char ch;

   puts("Start typing");
   puts("Press ~ then Enter to stop");

   while(ch!='~')
   {
      ch=getchar();
   }

   printf("Thanks!\n");
   return(0);

}

Thanks in advance.