If a variable is a pointer to a structure, then which of the following operator

If a variable is a pointer to a structure, then which of the following operator is used to access data members of the structure through the pointer variable?

2) What will be the output of the program ?

  #include<stdio.h>
  int main()
 {
     int x=30, *y, *z;
     y=&x; /* Assume address of x is 500 and integer is 4 byte size */
     z=y;
     *y++=*z++;
     x++;
     printf("x=%d, y=%d, z=%d\n", x, y, z);
     return 0;
 }

3) If a variable is a pointer to a structure, then which of the following operator is used to access data members of the structure through the pointer variable?

4) Which of the following does not initialize ptr to null (assuming variable declaration of a as int a=0;)?

5) What will be the output of the program ?

 #include<stdio.h>
 int main()
 {
     static char *s[] = {"black", "white", "pink", "violet"};
     char **ptr[] = {s+3, s+2, s+1, s}, ***p;
     p = ptr;
     ++p;
     printf("%s", **p+1);
     return 0;
 }