#include <stdio.h>
#include <string.h>

void main ( void )
{
  char string1[ 10 ] = { 0 };
  char string2[ 10 ] = { 0 };

  strncpy ( string1, "Hello World", 11 );  //违背1
  strncpy ( string2, "Hello "     , 6  );
  strncat ( string2, "world"      , 5  );  //违背2

  printf  ( "string1 = %s, string2 = %s\n", string1, string2 );
}