How Can I Check a Bit\'s Value in an Integer Without Bitwise Operators?

Determining Bit Value Without Bit Manipulation

In programming, it is often necessary to check the value of a specific bit in an integer variable without resorting to bit shifting or masking. This can be particularly useful in scenarios where speed or simplicity is prioritized.

Consider the following example in C/C :

int temp = 0x5E; // binary: 0b1011110

To determine if bit 3 in temp is 1 or 0 without using bit operations, a macro can be employed in C:

#define CHECK_BIT(var, pos) ((var) & (1 << (pos)))

Using this macro, the value of the n^th bit from the right end can be checked:

CHECK_BIT(temp, n - 1)

In C , an alternative approach is to utilize the std::bitset class:

std::bitset<8> bits(temp);
bool bit3_set = bits[3];

This technique provides a concise way to access and manipulate bits within an integer variable.

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