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
    int pos;
    for(pos =16;pos>0;pos--){
        if(reg&(1<<pos))
          break;
    }

    return reg&(1<<pos);
}
 // 44     // Binary: 0000000000101100  
 //32        // Binary: 0000000000100000

 // 512       // Binary: 0000001000000000  
// 512       // Binary: 0000001000000000
 
// Input:  255       // Binary: 0000000011111111  
 //128       // Binary: 0000000010000000
int main() {
    uint16_t reg;
    scanf("%hu", &reg);

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

Solving Approach