int printf(const char *_format, ...);
int scanf(const char *_format, ...);
int sprintf(char *_s, const char *_format, ...);
-int sscanf(char *_s, const char *_format, ...);
+int sscanf(const char *_s, const char *_format, ...);
int vfprintf(FILE *_stream, const char *_format, char *_arg);
int vprintf(const char *_format, char *_arg);
int vsprintf(char *_s, const char *_format, char *_arg);
#include <string.h>
#include "loc_incl.h"
-int sscanf(char *s, const char *format, ...)
+int sscanf(const char *s, const char *format, ...)
{
va_list ap;
int retval;