Objective-C Programming: The Big Nerd Ranch Guide

Other bitwise operators

For completeness, here are the other bitwise operators. These are less commonly used in Objective-C but good to know.

Exclusive-OR

You can exclusive-or (XOR) two bytes together to create a third. A bit in the third byte is 1 if exactly one of the corresponding bits in the input bytes is 1.

Figure 38.5  Two bytes bitwise-XORed together

This is done with the ^ operator. Add to main.c:

    unsigned char e = a ^ b;

    printf("Hex: %x ^ %x = %x\n", a, b, e);
    printf("Decimal: %d ^ %d = %d\n", a, b, e);

    return 0;
}

When you run it you will see:

Hex: 3c ^ a9 = 95
Decimal: 60 ^ 169 = 149

This operator ...