十進位轉二進位

#include <cstdio>
#include <cmath>
using namespace std;

int main(int argc, const char * argv[]) {
    long long int num,record=0;
    scanf("%lld",&num);
    while(num>0){
        record += pow(10.0,(double)(long long int)log2((double)num));
        num=num-pow(2.0,(double)(long long int)log2((double)num));
    }
    printf("%lld\n",record);
    return 0;
}