Program not ending?

Question

C++ / C#

Why doesn't the program terminate as soon as it displays the sequence. The program's task has been completed, but it is waiting for input.

#include <stdio.h>
#include <stdlib.h>
#include <conio.h>

int main() 
{
  char c;
  int i;
  printf("Vvedite stroky\n");
  i = 0;
  c = getchar();
  while (c!=EOF)
  {
    if(c == ':'){
      i++;
      c = getchar();
    }	
    if(i == 1){
      putchar(c);
    }
    c = getchar();
  };

  printf("\n");	
}

Answer 1

Because end of console from keyboard is OS dependent and for Windows it is Ctrl+Z.
Pressing enter does not pass EOF to the stream.