! foran og bagved

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

int
main ()
{

  char str1[] = "FUCK";
  int len1 = strlen(str1);
  char str2[len1+2]; 
  
  for (int i = 0; i < strlen(str1) + 1; i++) 
  {
      str2[i+1] = str1[i];
  }
  str2[0] = '!';
  str2[len1+1] = '!';
  str2[len1+2] = '\0';
  
  printf("%s", str2);
  
  return 0;

}