bitwise convertor.cpp

string convert(string &decimal){
    int p=decimal.size();
    for(int i=0;i<decimal.size();i++)
    if(decimal[i]=='.'){
            p=i;
            break;
    }
    int n1=atoi(decimal.substr(0,p).c_str());
    double n2=atof(decimal.c_str())-n1;

    string s1,s2;
    while(n1>0){
        s1=(n1%2==0?"0":"1")+s1;
        n1/=2;
    }
    while(n2>0){
        if(s2.size()>10)
            break;
        n2*=2;
        if(n2>=1){
            s2+="1";
            n2=n2-1;
        }else{
            s2+="0";
        }
    }
    if(s2.empty())
        return s1;
    else
        return s1+"."+s2;
}