diff --git a/programs/develop/ktcc/trunk/libc/include/ctype.h b/programs/develop/ktcc/trunk/libc/include/ctype.h
index af84cfb694..4c0362c67a 100644
--- a/programs/develop/ktcc/trunk/libc/include/ctype.h
+++ b/programs/develop/ktcc/trunk/libc/include/ctype.h
@@ -16,19 +16,19 @@
 #define __UPPER   512
 #define __XDIGIT 1024
 
-extern char __is[128];
+extern unsigned short __is[128];
 
-#define isalnum(c)(__is[c] & __ALNUM ) /* 'a'-'z', 'A'-'Z', '0'-'9' */
-#define isalpha(c)(__is[c] & __ALPHA ) /* 'a'-'z', 'A'-'Z' */
-#define iscntrl(c)(__is[c] & __CNTRL ) /* 0-31, 127 */
-#define isdigit(c)(__is[c] & __DIGIT ) /* '0'-'9' */
-#define isgraph(c)(__is[c] & __GRAPH ) /* '!'-'~' */
-#define islower(c)(__is[c] & __LOWER ) /* 'a'-'z' */
-#define isprint(c)(__is[c] & __PRINT ) /* ' '-'~' */
-#define ispunct(c)(__is[c] & __PUNCT ) /* !alnum && !cntrl && !space */
-#define isspace(c)(__is[c] & __BLANK ) /* HT, LF, VT, FF, CR, ' ' */
-#define isupper(c)(__is[c] & __UPPER ) /* 'A'-'Z' */
-#define isxdigit(c)(__is[c] & __XDIGIT) /* '0'-'9', 'a'-'f', 'A'-'F' */
+#define isalnum(c)(__is[c+1] & __ALNUM ) /* 'a'-'z', 'A'-'Z', '0'-'9' */
+#define isalpha(c)(__is[c+1] & __ALPHA ) /* 'a'-'z', 'A'-'Z' */
+#define iscntrl(c)(__is[c+1] & __CNTRL ) /* 0-31, 127 */
+#define isdigit(c)(__is[c+1] & __DIGIT ) /* '0'-'9' */
+#define isgraph(c)(__is[c+1] & __GRAPH ) /* '!'-'~' */
+#define islower(c)(__is[c+1] & __LOWER ) /* 'a'-'z' */
+#define isprint(c)(__is[c+1] & __PRINT ) /* ' '-'~' */
+#define ispunct(c)(__is[c+1] & __PUNCT ) /* !alnum && !cntrl && !space */
+#define isspace(c)(__is[c+1] & __BLANK ) /* HT, LF, VT, FF, CR, ' ' */
+#define isupper(c)(__is[c+1] & __UPPER ) /* 'A'-'Z' */
+#define isxdigit(c)(__is[c+1] & __XDIGIT) /* '0'-'9', 'a'-'f', 'A'-'F' */
 
 #define isascii(c) (!((c)&(~0x7f)))
 #define toascii(c) ((c)&0x7f)
diff --git a/programs/develop/ktcc/trunk/libc/include/stdio.h b/programs/develop/ktcc/trunk/libc/include/stdio.h
index 2a73ec7ac0..62923dceae 100644
--- a/programs/develop/ktcc/trunk/libc/include/stdio.h
+++ b/programs/develop/ktcc/trunk/libc/include/stdio.h
@@ -71,5 +71,12 @@ char * gets (char * str);
 typedef int (*virtual_getc)(void *sp, const void *obj);
 typedef void (*virtual_ungetc)(void *sp, int c, const void *obj);
 int format_scan(const void *src, const char *fmt, va_list argp, virtual_getc vgetc, virtual_ungetc vungetc);
+int vscanf ( const char * format, va_list arg );
+int scanf ( const char * format, ...);
+int vsscanf ( const char * s, const char * format, va_list arg );
+int sscanf ( const char * s, const char * format, ...);
+int vfscanf ( FILE * stream, const char * format, va_list arg );
+
+
 
 #endif
diff --git a/programs/develop/ktcc/trunk/libc/stdio/format_scan.c b/programs/develop/ktcc/trunk/libc/stdio/format_scan.c
index 57134cf3e5..d1abb2d9fd 100644
--- a/programs/develop/ktcc/trunk/libc/stdio/format_scan.c
+++ b/programs/develop/ktcc/trunk/libc/stdio/format_scan.c
@@ -18,6 +18,8 @@ todo:
 #include <ctype.h>
 #include <math.h>
 #include <stdarg.h>
+typedef int (*virtual_getc)(void *sp, const void *obj);
+typedef void (*virtual_ungetc)(void *sp, int c, const void *obj);
 
 enum flags_t
 {
@@ -170,7 +172,9 @@ int     try_parse_int(long long *digit, int ch, const void *src, void *save, vir
     {
         base = 8;
         ch = vgetc(save, src);
-        if (ch == EOF) return EOF;
+        if (ch == EOF || isspace(ch))
+            have_digits++;
+        else
         if (ch == 'x' || ch == 'X')
         {
             base = 16;
@@ -201,6 +205,8 @@ int     try_parse_int(long long *digit, int ch, const void *src, void *save, vir
             ch = vgetc(save, src);
             if (ch == EOF || isspace(ch)) break; // ok, just finish num
         }
+        else if (ch == EOF || isspace(ch))
+            break;
         else
         {
             vungetc(save, ch, src);
@@ -365,9 +371,9 @@ int format_scan(const void *src, const char *fmt, va_list argp, virtual_getc vge
             arg_str = va_arg(argp, char*);
             if (fmt1 == 0) length = 1;
             else length = fmt1;
-            for (i = 0; i < length; i++)
+            for (i = 0; i < length;)
             {
-                *arg_str++ = ch;
+                *arg_str++ = ch; i++;
                 ch = vgetc(&save, src);
                 if (ch == EOF) break;
             }
diff --git a/programs/develop/ktcc/trunk/libc/stdio/fscanf.c b/programs/develop/ktcc/trunk/libc/stdio/fscanf.c
index 669fef99a5..9ae0ff86f8 100644
--- a/programs/develop/ktcc/trunk/libc/stdio/fscanf.c
+++ b/programs/develop/ktcc/trunk/libc/stdio/fscanf.c
@@ -6,8 +6,11 @@ int virtual_getc_file(void *sp, const void *obj)
 // get next chat from file obj, save point is ptr to string char ptr
 {
     FILE *f = (FILE *)obj;
+    int     ch = fgetc(f);
 
-    return fgetc(f);
+//printf("getc '%c'[%d];", ch, ch);
+
+    return ch;
 }
 
 void virtual_ungetc_file(void *sp, int c, const void *obj)
diff --git a/programs/develop/ktcc/trunk/libc/stdio/ungetc.c b/programs/develop/ktcc/trunk/libc/stdio/ungetc.c
new file mode 100644
index 0000000000..5bfe0ea7be
--- /dev/null
+++ b/programs/develop/ktcc/trunk/libc/stdio/ungetc.c
@@ -0,0 +1,16 @@
+#include <stdio.h>
+// non standard realization - no support for virtually change char
+int ungetc(int c,FILE* file)
+{
+	dword res;
+
+	if ((file->mode & 3!=FILE_OPEN_READ) && (file->mode & FILE_OPEN_PLUS==0)) return EOF;
+
+	if (file->filepos>file->filesize || file->filepos==0)
+	{
+		return EOF;
+	}
+	file->filepos--;
+
+	return c;
+}
\ No newline at end of file
diff --git a/programs/develop/ktcc/trunk/libc/string/is.c b/programs/develop/ktcc/trunk/libc/string/is.c
index 19265ec0d1..8abb9f0dca 100644
--- a/programs/develop/ktcc/trunk/libc/string/is.c
+++ b/programs/develop/ktcc/trunk/libc/string/is.c
@@ -1,5 +1,6 @@
-#include "ctype.h"
-char __is[128] = {
+#include <ctype.h>
+unsigned short __is[129] = {
+ 0, /* EOF */
  0x004, 0x004, 0x004, 0x004, 0x004, 0x004, 0x004, 0x004,
  0x004, 0x104, 0x104, 0x104, 0x104, 0x104, 0x004, 0x004,
  0x004, 0x004, 0x004, 0x004, 0x004, 0x004, 0x004, 0x004,