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
    /*
    if (reg == 0)    return 0 ;

    uint16_t temp = reg ;
    int pos = -1 ;

    while (temp != 0){
        temp = temp >> 1 ;
        pos++ ;
    }

    return (1 << pos) ;
    */

    if (reg == 0)   return 0 ;

    uint16_t temp = 1U << 15 ;

    while ((temp & reg) == 0){
        temp >>= 1 ;
    }
    return temp ;
}

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

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

Solving Approach