Keep Only the Highest Set Bit

Code

#include <stdio.h>
#include <stdint.h>

// Complete the function
uint16_t highest_set_bit(uint16_t reg) {
    if (reg == 0)                       // If reg = 0
        return 0;

    uint16_t bitFlag = 0;               // Find MSB 
    for (uint16_t i = 0; i < 16; i++)   // Loop 
        if ((reg >> i) & 1)             // Check if MSB is 1
            bitFlag = i;
    return 1 << bitFlag;
}

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

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

Solving Approach