/* M.Hess, 22.04.2001 MC1 TSU */
#include <stdio.h>
#include <string.h>
#include <conio.h>
void main(void)
{
/* Deklarationen */
char user[20];
int result;
int size;
int i;
int abort;
int valid;
int negative;
char again;

/* Beginn Initialisierung */
clrscr();
gotoxy(25,1);
printf("*****   šbung 6 MHe       *****");
gotoxy(25,2);
printf("*****  Ascii -> Integer   *****");
do
  {
  /* Beginn Usereingaben */
  result = 0;
  negative = 0;
  gotoxy(1,4);
  printf("String eingeben: ");
  gets(user);

  /* Beginn Umwandlung */
  size = strlen(user);
  for (i=0; i<=size; i++)
    {
    switch (user[i])
      {
      case '1' : result = result * 10;
		 result = result + 1;
		 break;
      case '2' : result = result * 10;
		 result = result + 2;
		 break;
      case '3' : result = result * 10;
		 result = result + 3;
		 break;
      case '4' : result = result * 10;
		 result = result + 4;
		 break;
      case '5' : result = result * 10;
		 result = result + 5;
		 break;
      case '6' : result = result * 10;
		 result = result + 6;
		 break;
      case '7' : result = result * 10;
		 result = result + 7;
		 break;
      case '8' : result = result * 10;
		 result = result + 8;
		 break;
      case '9' : result = result * 10;
		 result = result + 9;
		 break;
      case '0' : result = result;
		 result = result * 10;
		 break;
      case '-' : if (i < 1)
		   negative = 1;
		 else i = size;
		 break;
      default : i = size; //verlassen der Schleife
		break;
      } // ende Switch
    } // ende for
  if (negative == 1)
   result = 0 - result; // wenn erstes Zeichen '-'
  printf("Die Eingabe ergibt gewandelt : %d \n ", 2result);
  do
    {
    printf("\nWeitere Umwandlungen (j/n)?");
    scanf("%c",&again);
    if (again == 'j')
      {
      abort = 0;
      valid = 1;
      }
      else if (again == 'n')
	{
	abort = 1;
	valid = 1;
	}
	else
	  {
	  valid = 0;
	  printf("Falsche Eingabe!");
	  }
      } while (valid == 1);
  clrscr();
  } // ende do
while (abort == 0);
}