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 following C code?

 #include <stdio.h>
 int x = 0;
 void main()
 {
     int *ptr = &x;
     printf("%p\n", ptr);
     x++;
     printf("%p\n ", ptr);
 }

3) 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;
 }

4) What will be the output of the following C code?

 #include <stdio.h>
 int x = 0;
 void main()
 {
     int *const ptr = &x;
     printf("%p\n", ptr);
     ptr++;
     printf("%p\n ", ptr);
 }

5) The operator used to get value at address stored in a pointer variable is