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 to find which highest bit is set?
    uint16_t t = 0;
    uint16_t value = 0;
    for(int i = 0; i <= 15; i++ ){
        // get state of lasted bit
        t = (reg << i)&(0x8000);
        // check val of lasted bit
        if (t == 0x8000) {
            // toggle at position bit.
            value = value | (1 <<(15-i));
            break;
        }
    }
    return value;
}

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

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

Solving Approach