Pointers Arithmetic

A pointer can point to element of an array

      float x[5];
      float *y = &x[0];
      float *z = x;

• y is a pointer to x[0]

• z is also a pointer to x[0]

• y+1 is pointer to x[1]

• thus *(y+1) and x[1] access the same object

• y[1] is shorthand for *(y+1)

• integer add, subtract and relational operators are allowed on pointers

What's wrong here?

      float x[5];
      float* y, z;
      y = x;    /* OK */
      z = x;    /* WRONG */

• z is a float and not a float *