How Can I Represent Binary Numbers in C and C ?

Working with Binary Numbers in C and C

When dealing with binary numbers in C or C , a common question arises: is there a native representation for binary literals?

Attempting to Use Octal Notation

Attempting to write binary numbers as octal literals, such as 00010000, as seen in the provided example, will result in an error. Octal literals are not a valid representation for binary numbers in C or C .

Binary Literals in GCC and the C Standard

However, if you are using GCC, you can leverage a GCC extension (which has been incorporated into the C 14 standard) that supports binary literals. This extension allows you to write binary numbers using the prefix 0b, followed by the binary digits. For example:

int x = 0b00010000;

Alternative Solutions

If you are not using GCC or the extension is not available to you, an alternative solution is to use hexadecimal representation, which shares the following value system with binary:

int x = 0x10; // Hexadecimal representation of 00010000

Conclusion

In C and C , you can represent binary numbers using GCC extension 0b for binary literals or by using hexadecimal representation. Choose the approach that best aligns with your compiler compatibility and project requirements.

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