Keep Only the Highest Set Bit

Code

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

// Complete the function
uint16_t highest_set_bit(uint16_t reg) {
    int i,j,L,num=0;
    for(i=0,L=0;i<32;i++){
        if(reg>>i&1){
          if(i>L)
          L=i;
          else
          i=i;
        }
    }
    if(L>1)
    num=num|1<<L;
    return num;
}

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

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

Solving Approach