Keep Only the Highest Set Bit

Code

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

// Complete the function
uint16_t highest_set_bit(uint16_t reg) {
    // Your logic here
    // since the datatype is unsigned int 16bit - no signed mention on MSB
    // Hence, MSB is 15 and LSB is 0
    // lets create a for loop to check the each bit starting from MSB and decrease until the value is 1
    // then mask the integer and return that value
    uint16_t mask = 0;
    for(uint8_t i = 15; i>0; i--)
    {
        
        if (reg & (1 << i))
        {
            return (mask | (1<<i));  
        }
    }  
    return 0;
}

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

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

Solving Approach