#include <stdio.h>
#include <iostream>
#include <string>
#include <string.h>
#include <sstream>
#include <iomanip>
using namespace std;
double round(double in, unsigned short decimal_presition)
{
int n_i = in;
double small = (double)(in - n_i + (double)(*pow(, -decimal_presition - ));
int n_f = small*(double)(pow(, decimal_presition));
return n_i + (double)n_f/pow(, decimal_presition);
}
double round_price(double price, int dotnum)
{
double out_price = 0.0;
char buf[];
memset(buf, , );
std::string str("%.");
sprintf(buf, "%d", dotnum);
str += buf;
str += "lf";
memset(buf, , );
double cal_price = price + 0.0000001;
sprintf(buf, str.c_str(), cal_price);
cout << buf << endl;
sscanf(buf, "%lf", &out_price);
return out_price;
}
int main()
{
double dd = 5.6666666666;
double two = round_price(dd, );
cout << two << endl;
stringstream stream;
stream <<setiosflags(ios::fixed);
stream.precision();
stream << 5.665111;
double one;
stream >> one;
cout << one << endl;
return ;
}