Mine

do
{
	choice = getchar();
	fflush(stdin);
	switch (choice)
         {
                case '1': printf("You have uploaded a total of: %dB", upspd * secs);
                     break;
                case '2': printf("You have uploaded a total of: %fkB", (float) upspd * secs / 1024);
                     break;
                case '3': printf("You have uploaded a total of: %fmB", (float) upspd * secs / 1024 / 1024);
                     break;
                case else: printf("You didn't type 1, 2 or 3...");
                     break;
         }
 }while (choice != 1 || choice != 2 || choice != 3);