104 lines
2.2 KiB
C++
104 lines
2.2 KiB
C++
// stock20.cpp -- augmented version
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#include <iostream>
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#include "stock20.h"
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using namespace std;
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// constructors
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Stock::Stock() // default constructor
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{
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shares = 0;
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share_val = 0.0;
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total_val = 0.0;
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}
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Stock::Stock(const std::string & co, long n, double pr)
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{
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company = co;
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if (n < 0)
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{
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std::cout << "Number of shares can't be negative; "
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<< company << " shares set to 0.\n";
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shares = 0;
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}
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else
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shares = n;
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share_val = pr;
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set_tot();
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}
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// class destructor
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Stock::~Stock() // quiet class destructor
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{
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}
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// other methods
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void Stock::buy(long num, double price)
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{
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if (num < 0)
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{
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std::cout << "Number of shares purchased can't be negative. "
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<< "Transaction is aborted.\n";
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}
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else
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{
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shares += num;
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share_val = price;
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set_tot();
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}
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}
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void Stock::sell(long num, double price)
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{
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using std::cout;
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if (num < 0)
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{
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cout << "Number of shares sold can't be negative. "
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<< "Transaction is aborted.\n";
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}
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else if (num > shares)
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{
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cout << "You can't sell more than you have! "
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<< "Transaction is aborted.\n";
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}
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else
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{
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shares -= num;
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share_val = price;
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set_tot();
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}
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}
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void Stock::update(double price)
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{
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share_val = price;
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set_tot();
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}
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void Stock::show() const
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{
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using std::cout;
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using std::ios_base;
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// set format to #.###
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ios_base::fmtflags orig =
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cout.setf(ios_base::fixed, ios_base::floatfield);
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std::streamsize prec = cout.precision(3);
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cout << "Company: " << company
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<< " Shares: " << shares << '\n';
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cout << " Share Price: $" << share_val;
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// set format to #.##
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cout.precision(2);
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cout << " Total Worth: $" << total_val << '\n';
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// restore original format
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cout.setf(orig, ios_base::floatfield);
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cout.precision(prec);
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}
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const Stock & Stock::topval(const Stock & s) const
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{
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if (s.total_val > total_val)
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return s;
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else
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return *this;
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}
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