Can I Use Binary Literals Directly in C/C ?

Working with Binary Numbers in C/C

In programming, binary numbers are essential for a variety of tasks. However, the question arises: can binary literals be directly used in C or C ?

In the context of the question, an attempt to represent a binary number using a character literal as const char x = 00010000; fails. This is because in C, leading zeros are considered octal literals rather than binary literals.

Fortunately, there are solutions to this challenge.

GCC Extension

If you are using the GNU Compiler Collection (GCC), you can take advantage of its extension that has been incorporated into the C 14 standard. This extension allows you to use the 0b prefix to specify binary literals. For example:

int x = 0b00010000;

This would correctly represent the binary number 00010000 in C .

Hexadecimal Alternative

If GCC is not available, or if you prefer not to use the extension, an alternative solution is to use hexadecimal literals. Hexadecimal numbers have a base of 16 and use symbols 0 through 9 and A through F to represent values. The binary number 00010000 can be represented using the hexadecimal value 10, which can be written in C as:

const char x = 0x10;

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