Keep Only the Highest Set Bit

Question

Problem: Keep Only the Highest Set Bit. Solve this hands-on electronics task on EWskills.

Accepted Answer

#include 
#include 

uint16_t highest_set_bit(uint16_t reg) {
    if (reg == 0) return 0;

    uint16_t result = 1U << 15; // find the highest set bit.
    while ((reg & result) == 0) {
        result >>= 1;
    }

    return result;
}

int main() {
    uint16_t reg;
    scanf("%hu", ®);

    uint16_t result = highest_set_bit(reg);
    printf("%hu", result);
    return 0;
}

9. Keep Only the Highest Set Bit