Functions that implement the input echo * number

/*
When the user enters the password, it is often echoed * or other hidden characters, so:
*/

#define MaxLen 6
Char passwd[maxlen+1]= "";

Char *getpasswd () {
   unsigned  char c;
   int i=0;
   while ((C=getch ())! = ' \ r ') {
      if (I<maxlen&&isprint (c)) {
         Passwd[i++]=c;
         Putchar (' * ');
      } else if (i>0&&c== ' \b ') {
         I.;
         Putchar (' \b ');
         Putchar (");
         Putchar (' \b ');
      }
   }
   Putchar (' \ n ');
   passwd[i]= ' + ';
   return passwd;
}

Convert a string to an orthopedic **************/
int Changechar (char *str) {
   int num=0,k,len,j;
   Len=strlen (str);
   for (; *str; str++) {
      k=*str-' 0 ';
      J= (--len);
      while (j--) k*=10;
      Num+=k;
   }
   return num;                Converts character-type passwords to integer types
}

Functions that implement the input echo * number