code without this #include

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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How to write this code without this #include <iomanip>

#include <iostream>
#include <iomanip>

using namespace std;

int main() {
    const double BROKERAGE_FEE = 0.015;
    double buyingPrice, sellingPrice, netAmount, originalInvestment, totalFees;
    int sharesSold;
    
    cout << "Enter the purchase price of each share: ";
    cin >> buyingPrice;
    cout << "Enter the selling price of each share: ";
    cin >> sellingPrice;
    cout << "Enter the number of shares sold: ";
    cin >> sharesSold;
    
    originalInvestment = sharesSold * buyingPrice;
    totalFees = (sharesSold * sellingPrice) * BROKERAGE_FEE;
    netAmount = (sharesSold * sellingPrice) - totalFees;
    
    cout << fixed << showpoint << setprecision(2) << endl;
    
    cout << "Total amount invested: $" << originalInvestment << endl;
    cout << "Total amount received from selling: $" << netAmount << endl;
    cout << "Total service charges: $" << totalFees << endl;
    cout << "Amount gained or lost: $" << netAmount - originalInvestment << endl;
    return 0;
}

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