![]() These bit manipulation operations are undeniably primitive, trivial actions to a CPU. ![]() But beyond the intellectual satisfaction that these operators provide by allowing us to come closer to the internal operations of a computer, they are also very efficient. The vast majority of programming languages take care of these behind the scenes, during compilation, for example. The usefulness of bit shifting and bitwise operations may seem pretty limited at first glance. Why Use Bit Shifting and Bitwise Operations? Once more, without changing the values of our binary numbers, we get a very different result because only the bits with a value of 1 in one number but not the other are added to the result.Īnd of course, the opposite operation, XNOR can be done with ~(nb1 ^ nb2). */ static unsigned ft_itoa_len ( unsigned n, unsigned base) Code language: C++ ( cpp ) Here is the source code :įt_unsigned_itoa_base.c # include /* ft_itoa_len: * Measures the length of the string of an unsigned integer. We will have two files, bitwise.c which we will modify over the course of this article to test each bitwise operator, and ft_unsigned_itoa_base.c for formatting. Which means we need to write our own function to format our binary number correctly. Sadly, printf does not offer any specification to print an integer in base 2. It will print out the 32 bits of an unsigned integer with spaces for readability. ![]() In order to take a closer look at each of these operators, let’s create a small C program. XOR : logical operator to compare two bit fields OR : logical operator to compare two bit fields Shift all the bits of a bit field to the rightĪND : logical operator to compare two bit fields In programming languages that allow low-level bit manipulation, such as C, the operators are as follows: Operator
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