PIC16F87x using a pointer

[ahmet2005]

I am trying to access specific I/O pins on a PIC16F87x using a pointer in C. However this doesn't work why?

char *Dir = (unsigned)&PORTB*8+0 producess Dir = 0x0030;
*Dir = 1; (supposed to set RB0) does nothing.

Using the header file which states that
RB0 @ &PORTB*8+0; the following does set bit RB0 = 1;

Problem is I need to change a clock signal from one pin to another dynamically depending on the input.

[Mark]

You can't have a pointer to bits (or I/O). You can only have a pointer to the port. Port B is located at 0x06. You multiplied this by 0x08 which gave you 0x30. You will need to point to the port and use bit_set, bit_clear CCS functions or 'OR' with a bitmask and 'AND' with an inverted bit mask.