How to resolve "illegal,left operand has type 'double" error?

[Terry Archer]

error C2296: '%' : illegal,left operand has type 'double'

#include <iostream>
#include <fstream>
#include <iomanip>
using namespace std;
 
const int OUNCES_PER_POUND = 16; 
const double POUNDS_PER_KILOGRAM = 2.2;
 
int main()
{
    int Pounds;
    int Ounces;
    double Kilograms;
    double totalPounds;
    double totalOunces;
 
    ifstream fin;
    ofstream fout;
 
    fin.open("inData.txt");
    fout.open("outData.txt");
 
    fin >> Kilograms;
 
    totalPounds = static_cast<double>(Kilograms * POUNDS_PER_KILOGRAM);
    totalOunces = static_cast<double>(Pounds * OUNCES_PER_POUND);
    Pounds = static_cast<int>(totalOunces / OUNCES_PER_POUND + 0.5);
    Ounces = static_cast<int>(totalPounds % OUNCES_PER_POUND);
 
    fout << Pounds << "\nPounds";
    fout << Ounces << "\nOunces";
    fin.close();
    fout.close();
 
return 0;
}

[tdlr]

You cannot use % with double. Change totalPounds to an integer type like long.