#include <iostream>#include <iomanip>using namespace std;#include "simpleinvoiceprinter.h"SimpleInvoicePrinter::SimpleInvoicePrinter(vector<int> widths){   column_widths = widths;   column = 0;}void SimpleInvoicePrinter::print_header(string s){      int width = 0;   for (int i = 0; i < column_widths.size(); i++)       width = width + column_widths[i];   for (int j = 0; j < (width - s.length()) / 2; j++)      cout << " ";   cout << s << "\n\n";}void SimpleInvoicePrinter::next_column(){   column++;   if (column == column_widths.size())   {      cout << "\n";      column = 0;         }}void SimpleInvoicePrinter::print_string(string value, bool pad_right){   if (pad_right) cout << value;   // print padding   for (int i = value.length(); i < column_widths[column]; i++)      cout << " ";   if (!pad_right) cout << value;   next_column();}void SimpleInvoicePrinter::print_number(double value, int precision){   cout << setw(column_widths[column])       << fixed << setprecision(precision)       << value;   next_column();}void SimpleInvoicePrinter::print_footer(string s, double total){   cout << "\n" << s << " " << total << "\n";}