├── README.md
├── buy_and_sell_stocks.cpp
└── LICENSE


/README.md:
--------------------------------------------------------------------------------
 1 | ## Software Requirements Specification (SRS)
 2 | 
 3 | The Stock Trading System is a console-based application designed to facilitate the buying and selling of stocks, allowing users to manage their
 4 | investment portfolios efficiently. The application will provide users with a predefined set of stocks to trade, ensuring a user-friendly experience
 5 | while introducing fundamental trading concepts. Users will be able to perform various operations, including buying and selling stocks by specifying 
 6 | stock symbols and quantities. The system will validate each transaction to ensure that users have sufficient balance for purchases and ownership for sales.
 7 | 
 8 | The application will feature a portfolio management system that displays the user's current holdings, including stock quantities,
 9 | average purchase prices, and the remaining balance available for trading. It will employ a simple user interface that guides users 
10 | through their options, allowing them to view their portfolios and execute trades seamlessly. The core components of the system will
11 | include a Stock class representing individual stocks, which will contain attributes such as stock symbol and price, and a Portfolio class that manages user investments and account balance.
12 | 
13 | The system will be implemented in C++, and users will need a compatible compiler to run the application. The primary target users are
14 | individuals who are new to stock trading and want to understand basic trading principles while learning C++. This SRS outlines the functional 
15 | and non-functional requirements of the Stock Trading System, serving as a foundational document for future development and enhancements.
16 | 


--------------------------------------------------------------------------------
/buy_and_sell_stocks.cpp:
--------------------------------------------------------------------------------
  1 | #include <iostream>
  2 | #include <map>
  3 | #include <string>
  4 | #include <iomanip>
  5 | 
  6 | using namespace std;  
  7 | 
  8 | class Stock {
  9 | public:
 10 |     string symbol;
 11 |     double price;
 12 | 
 13 |     Stock() : symbol(""), price(0.0) {} // Default constructor
 14 |     Stock(string s, double p) : symbol(s), price(p) {}
 15 | };
 16 | 
 17 | class Portfolio {
 18 | private:
 19 |     map<string, pair<int, double>> holdings; // <Stock Symbol, <Quantity, Average Price>>
 20 |     double balance;
 21 | 
 22 | public:
 23 |     Portfolio() : balance(10000.0) {}
 24 | 
 25 |     void buyStock(const Stock& stock, int quantity) {
 26 |         double totalCost = stock.price * quantity;
 27 |         if (totalCost > balance) {
 28 |             cout << "Insufficient balance to buy " << quantity << " of " << stock.symbol << ".\n";
 29 |             return;
 30 |         }
 31 |         balance -= totalCost;
 32 | 
 33 |         if (holdings.find(stock.symbol) != holdings.end()) {
 34 |             int currentQuantity = holdings[stock.symbol].first;
 35 |             double averagePrice = holdings[stock.symbol].second;
 36 |             averagePrice = (averagePrice * currentQuantity + stock.price * quantity) / (currentQuantity + quantity);
 37 |             holdings[stock.symbol] = {currentQuantity + quantity, averagePrice};
 38 |         } else {
 39 |             holdings[stock.symbol] = {quantity, stock.price};
 40 |         }
 41 |         cout << "Bought " << quantity << " of " << stock.symbol << " for $" << totalCost << ". New balance: $" << balance << ".\n";
 42 |     }
 43 | 
 44 |     void sellStock(const Stock& stock, int quantity) {
 45 |         if (holdings.find(stock.symbol) == holdings.end() || holdings[stock.symbol].first < quantity) {
 46 |             cout << "Not enough shares of " << stock.symbol << " to sell.\n";
 47 |             return;
 48 |         }
 49 |         int currentQuantity = holdings[stock.symbol].first;
 50 |         holdings[stock.symbol].first -= quantity;
 51 |         double totalRevenue = stock.price * quantity;
 52 |         balance += totalRevenue;
 53 |         cout << "Sold " << quantity << " of " << stock.symbol << " for $" << totalRevenue << ". New balance: $" << balance << ".\n";
 54 | 
 55 |         if (holdings[stock.symbol].first == 0) {
 56 |             holdings.erase(stock.symbol);
 57 |         }
 58 |     }
 59 | 
 60 |     void showPortfolio() const {
 61 |         cout << "\nCurrent Portfolio:\n";
 62 |         if (holdings.empty()) {
 63 |             cout << "No stocks in the portfolio.\n";
 64 |             return;
 65 |         }
 66 |         for (const auto& entry : holdings) {
 67 |             cout << "Stock: " << entry.first
 68 |                  << ", Quantity: " << entry.second.first
 69 |                  << ", Average Price: $" << fixed << setprecision(2) << entry.second.second << "\n";
 70 |         }
 71 |         cout << "Balance: $" << fixed << setprecision(2) << balance << "\n";
 72 |     }
 73 | };
 74 | 
 75 | void showMenu() {
 76 |     cout << "\nStock Trading System\n";
 77 |     cout << "1. Buy Stock\n";
 78 |     cout << "2. Sell Stock\n";
 79 |     cout << "3. View Portfolio\n";
 80 |     cout << "4. Exit\n";
 81 | }
 82 | 
 83 | int main() {
 84 |     Portfolio portfolio;
 85 |     map<string, Stock> stockMarket = {
 86 |         {"AAPL", Stock("AAPL", 175.23)},
 87 |         {"GOOGL", Stock("GOOGL", 2835.46)},
 88 |         {"MSFT", Stock("MSFT", 310.75)},
 89 |         {"TSLA", Stock("TSLA", 735.46)},
 90 |         {"AMZN", Stock("AMZN", 3472.75)}
 91 |     };
 92 | 
 93 |     while (true) {
 94 |         showMenu();
 95 |         int choice;
 96 |         cout << "Enter your choice: ";
 97 |         cin >> choice;
 98 | 
 99 |         if (choice == 1) {
100 |             string symbol;
101 |             int quantity;
102 |             cout << "Enter the stock symbol to buy: ";
103 |             cin >> symbol;
104 |             if (stockMarket.find(symbol) == stockMarket.end()) {
105 |                 cout << "Invalid stock symbol.\n";
106 |                 continue;
107 |             }
108 |             cout << "Enter quantity to buy: ";
109 |             cin >> quantity;
110 |             if (quantity <= 0) {
111 |                 cout << "Quantity must be greater than zero.\n";
112 |                 continue;
113 |             }
114 |             portfolio.buyStock(stockMarket[symbol], quantity);
115 |         } else if (choice == 2) {
116 |             string symbol;
117 |             int quantity;
118 |             cout << "Enter the stock symbol to sell: ";
119 |             cin >> symbol;
120 |             if (stockMarket.find(symbol) == stockMarket.end()) {
121 |                 cout << "Invalid stock symbol.\n";
122 |                 continue;
123 |             }
124 |             cout << "Enter quantity to sell: ";
125 |             cin >> quantity;
126 |             if (quantity <= 0) {
127 |                 cout << "Quantity must be greater than zero.\n";
128 |                 continue;
129 |             }
130 |             portfolio.sellStock(stockMarket[symbol], quantity);
131 |         } else if (choice == 3) {
132 |             portfolio.showPortfolio();
133 |         } else if (choice == 4) {
134 |             cout << "Exiting the system.\n";
135 |             break;
136 |         } else {
137 |             cout << "Invalid choice. Please try again.\n";
138 |         }
139 |     }
140 | 
141 |     return 0;
142 | }
143 | 


--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
  1 |                                  Apache License
  2 |                            Version 2.0, January 2004
  3 |                         http://www.apache.org/licenses/
  4 | 
  5 |    TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
  6 | 
  7 |    1. Definitions.
  8 | 
  9 |       "License" shall mean the terms and conditions for use, reproduction,
 10 |       and distribution as defined by Sections 1 through 9 of this document.
 11 | 
 12 |       "Licensor" shall mean the copyright owner or entity authorized by
 13 |       the copyright owner that is granting the License.
 14 | 
 15 |       "Legal Entity" shall mean the union of the acting entity and all
 16 |       other entities that control, are controlled by, or are under common
 17 |       control with that entity. For the purposes of this definition,
 18 |       "control" means (i) the power, direct or indirect, to cause the
 19 |       direction or management of such entity, whether by contract or
 20 |       otherwise, or (ii) ownership of fifty percent (50%) or more of the
 21 |       outstanding shares, or (iii) beneficial ownership of such entity.
 22 | 
 23 |       "You" (or "Your") shall mean an individual or Legal Entity
 24 |       exercising permissions granted by this License.
 25 | 
 26 |       "Source" form shall mean the preferred form for making modifications,
 27 |       including but not limited to software source code, documentation
 28 |       source, and configuration files.
 29 | 
 30 |       "Object" form shall mean any form resulting from mechanical
 31 |       transformation or translation of a Source form, including but
 32 |       not limited to compiled object code, generated documentation,
 33 |       and conversions to other media types.
 34 | 
 35 |       "Work" shall mean the work of authorship, whether in Source or
 36 |       Object form, made available under the License, as indicated by a
 37 |       copyright notice that is included in or attached to the work
 38 |       (an example is provided in the Appendix below).
 39 | 
 40 |       "Derivative Works" shall mean any work, whether in Source or Object
 41 |       form, that is based on (or derived from) the Work and for which the
 42 |       editorial revisions, annotations, elaborations, or other modifications
 43 |       represent, as a whole, an original work of authorship. For the purposes
 44 |       of this License, Derivative Works shall not include works that remain
 45 |       separable from, or merely link (or bind by name) to the interfaces of,
 46 |       the Work and Derivative Works thereof.
 47 | 
 48 |       "Contribution" shall mean any work of authorship, including
 49 |       the original version of the Work and any modifications or additions
 50 |       to that Work or Derivative Works thereof, that is intentionally
 51 |       submitted to Licensor for inclusion in the Work by the copyright owner
 52 |       or by an individual or Legal Entity authorized to submit on behalf of
 53 |       the copyright owner. For the purposes of this definition, "submitted"
 54 |       means any form of electronic, verbal, or written communication sent
 55 |       to the Licensor or its representatives, including but not limited to
 56 |       communication on electronic mailing lists, source code control systems,
 57 |       and issue tracking systems that are managed by, or on behalf of, the
 58 |       Licensor for the purpose of discussing and improving the Work, but
 59 |       excluding communication that is conspicuously marked or otherwise
 60 |       designated in writing by the copyright owner as "Not a Contribution."
 61 | 
 62 |       "Contributor" shall mean Licensor and any individual or Legal Entity
 63 |       on behalf of whom a Contribution has been received by Licensor and
 64 |       subsequently incorporated within the Work.
 65 | 
 66 |    2. Grant of Copyright License. Subject to the terms and conditions of
 67 |       this License, each Contributor hereby grants to You a perpetual,
 68 |       worldwide, non-exclusive, no-charge, royalty-free, irrevocable
 69 |       copyright license to reproduce, prepare Derivative Works of,
 70 |       publicly display, publicly perform, sublicense, and distribute the
 71 |       Work and such Derivative Works in Source or Object form.
 72 | 
 73 |    3. Grant of Patent License. Subject to the terms and conditions of
 74 |       this License, each Contributor hereby grants to You a perpetual,
 75 |       worldwide, non-exclusive, no-charge, royalty-free, irrevocable
 76 |       (except as stated in this section) patent license to make, have made,
 77 |       use, offer to sell, sell, import, and otherwise transfer the Work,
 78 |       where such license applies only to those patent claims licensable
 79 |       by such Contributor that are necessarily infringed by their
 80 |       Contribution(s) alone or by combination of their Contribution(s)
 81 |       with the Work to which such Contribution(s) was submitted. If You
 82 |       institute patent litigation against any entity (including a
 83 |       cross-claim or counterclaim in a lawsuit) alleging that the Work
 84 |       or a Contribution incorporated within the Work constitutes direct
 85 |       or contributory patent infringement, then any patent licenses
 86 |       granted to You under this License for that Work shall terminate
 87 |       as of the date such litigation is filed.
 88 | 
 89 |    4. Redistribution. You may reproduce and distribute copies of the
 90 |       Work or Derivative Works thereof in any medium, with or without
 91 |       modifications, and in Source or Object form, provided that You
 92 |       meet the following conditions:
 93 | 
 94 |       (a) You must give any other recipients of the Work or
 95 |           Derivative Works a copy of this License; and
 96 | 
 97 |       (b) You must cause any modified files to carry prominent notices
 98 |           stating that You changed the files; and
 99 | 
100 |       (c) You must retain, in the Source form of any Derivative Works
101 |           that You distribute, all copyright, patent, trademark, and
102 |           attribution notices from the Source form of the Work,
103 |           excluding those notices that do not pertain to any part of
104 |           the Derivative Works; and
105 | 
106 |       (d) If the Work includes a "NOTICE" text file as part of its
107 |           distribution, then any Derivative Works that You distribute must
108 |           include a readable copy of the attribution notices contained
109 |           within such NOTICE file, excluding those notices that do not
110 |           pertain to any part of the Derivative Works, in at least one
111 |           of the following places: within a NOTICE text file distributed
112 |           as part of the Derivative Works; within the Source form or
113 |           documentation, if provided along with the Derivative Works; or,
114 |           within a display generated by the Derivative Works, if and
115 |           wherever such third-party notices normally appear. The contents
116 |           of the NOTICE file are for informational purposes only and
117 |           do not modify the License. You may add Your own attribution
118 |           notices within Derivative Works that You distribute, alongside
119 |           or as an addendum to the NOTICE text from the Work, provided
120 |           that such additional attribution notices cannot be construed
121 |           as modifying the License.
122 | 
123 |       You may add Your own copyright statement to Your modifications and
124 |       may provide additional or different license terms and conditions
125 |       for use, reproduction, or distribution of Your modifications, or
126 |       for any such Derivative Works as a whole, provided Your use,
127 |       reproduction, and distribution of the Work otherwise complies with
128 |       the conditions stated in this License.
129 | 
130 |    5. Submission of Contributions. Unless You explicitly state otherwise,
131 |       any Contribution intentionally submitted for inclusion in the Work
132 |       by You to the Licensor shall be under the terms and conditions of
133 |       this License, without any additional terms or conditions.
134 |       Notwithstanding the above, nothing herein shall supersede or modify
135 |       the terms of any separate license agreement you may have executed
136 |       with Licensor regarding such Contributions.
137 | 
138 |    6. Trademarks. This License does not grant permission to use the trade
139 |       names, trademarks, service marks, or product names of the Licensor,
140 |       except as required for reasonable and customary use in describing the
141 |       origin of the Work and reproducing the content of the NOTICE file.
142 | 
143 |    7. Disclaimer of Warranty. Unless required by applicable law or
144 |       agreed to in writing, Licensor provides the Work (and each
145 |       Contributor provides its Contributions) on an "AS IS" BASIS,
146 |       WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
147 |       implied, including, without limitation, any warranties or conditions
148 |       of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
149 |       PARTICULAR PURPOSE. You are solely responsible for determining the
150 |       appropriateness of using or redistributing the Work and assume any
151 |       risks associated with Your exercise of permissions under this License.
152 | 
153 |    8. Limitation of Liability. In no event and under no legal theory,
154 |       whether in tort (including negligence), contract, or otherwise,
155 |       unless required by applicable law (such as deliberate and grossly
156 |       negligent acts) or agreed to in writing, shall any Contributor be
157 |       liable to You for damages, including any direct, indirect, special,
158 |       incidental, or consequential damages of any character arising as a
159 |       result of this License or out of the use or inability to use the
160 |       Work (including but not limited to damages for loss of goodwill,
161 |       work stoppage, computer failure or malfunction, or any and all
162 |       other commercial damages or losses), even if such Contributor
163 |       has been advised of the possibility of such damages.
164 | 
165 |    9. Accepting Warranty or Additional Liability. While redistributing
166 |       the Work or Derivative Works thereof, You may choose to offer,
167 |       and charge a fee for, acceptance of support, warranty, indemnity,
168 |       or other liability obligations and/or rights consistent with this
169 |       License. However, in accepting such obligations, You may act only
170 |       on Your own behalf and on Your sole responsibility, not on behalf
171 |       of any other Contributor, and only if You agree to indemnify,
172 |       defend, and hold each Contributor harmless for any liability
173 |       incurred by, or claims asserted against, such Contributor by reason
174 |       of your accepting any such warranty or additional liability.
175 | 
176 |    END OF TERMS AND CONDITIONS
177 | 
178 |    APPENDIX: How to apply the Apache License to your work.
179 | 
180 |       To apply the Apache License to your work, attach the following
181 |       boilerplate notice, with the fields enclosed by brackets "[]"
182 |       replaced with your own identifying information. (Don't include
183 |       the brackets!)  The text should be enclosed in the appropriate
184 |       comment syntax for the file format. We also recommend that a
185 |       file or class name and description of purpose be included on the
186 |       same "printed page" as the copyright notice for easier
187 |       identification within third-party archives.
188 | 
189 |    Copyright [yyyy] [name of copyright owner]
190 | 
191 |    Licensed under the Apache License, Version 2.0 (the "License");
192 |    you may not use this file except in compliance with the License.
193 |    You may obtain a copy of the License at
194 | 
195 |        http://www.apache.org/licenses/LICENSE-2.0
196 | 
197 |    Unless required by applicable law or agreed to in writing, software
198 |    distributed under the License is distributed on an "AS IS" BASIS,
199 |    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
200 |    See the License for the specific language governing permissions and
201 |    limitations under the License.
202 | 


--------------------------------------------------------------------------------