Question

I don’t understand why this program print “klmnop” and not just “klm“.
b is an array of size 2!
This is the code:

struct S
{
  int i1;
  int i2;
  char b[2];
};

int main()
{
  char a[] = "abcdefghijklmnop";

  struct S* s = a + 2;
  printf("[%s]\n" , s->b);

  return 0;
}

Answer 1

because printf("[%s]\n" , s->b); prints the data from the address s->b to the character '\0'. after the address s->b whenever it will find the '\0' it will print the data.

char b[2]; 

above statement do not include '\0' at the last character so it will continue reading the data from the address untill it find String terminator '\0'