some strange wtf

Good day.
I have this, near equal code:

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

char *rs1 (const char *str)
{
  char res1[6];
  strncpy(res1,str,3);
  res1[3]='\0';
  return res1;
}

char *rs2 (const char *str)
{
  char *res2 = new char[6];
  strncpy(res2,str,3);
  res2[3]='\0';
  return res2;
}

int main ()
{
  char str[] ="+OK 1 523\r\n";

  puts(rs1(str));
  puts(rs2(str));

  return 0;
}


But console output differs! Can you plz explain why?? Thanks in advance.
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char *rs1 (const char *str)
{
  char res1[6];
  strncpy(res1,str,3);
  res1[3]='\0';
  return res1;
}


I guess this is wrong, you're returning local variable. Change this function as

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char *rs1 (const char *str)
{
  char *res1 = new char[6];
  strncpy(res1,str,3);
  res1[3]='\0';
  return res1;
}



oh, i haven't noticed that.

BTW, code gives correct result to me , after i've done that change

My output console :

+OK
+OK
What system and compiler you are using?
Windows OS , Dev c++ ide
Windows not localized? I mean "pure" english version?
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