bitset1

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Main Page → Exercises → C → Solve an Exercise

Language/Type: C bitwise operators bit manipulation

Author: Julie Zelenski (on 2018/02/03)

Bit masks are an important part of coding bitwise operations. Often you might need to set or clear a particular bit in a mask, and the following functions accomplish that:

int bitset(int num, int pos)
{
    return num | (1 << pos);
}

int bitclear(int num, int pos)
{
    return num & (~(1 << pos));
}

Given the above functions, what is the return value in base-10 for each of the following expressions?

`bitset(22, 5)`
`bitset(15, 31)`
`bitset(12, 0)`
`bitclear(54, 5)`
`bitclear(15, 31)`
`bitclear(-12, 31)`

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