chpt 1.5

Author: elstr-512

.vscode/tasks.json

@@ -7,9 +7,9 @@
             "args": [
                 "-fdiagnostics-color=always",
                 "-g",
-                "${file}",
+                "${fileDirname}/*.cpp",
                 "-o",
-                "${fileDirname}/${fileBasenameNoExtension}.out"
+                "${fileDirname}/main.out"
             ],
             "options": {
                 "cwd": "${fileDirname}"

…/chpt_1_ACppPrimer/aSimpleCppProgram.cpp …/aSimpleCppProgram/aSimpleCppProgram.cppsource/chpt_1_ACppPrimer/aSimpleCppProgram.cpp renamed to source/chpt_1_ACppPrimer/aSimpleCppProgram/aSimpleCppProgram.cpp source/chpt_1_ACppPrimer/aSimpleCppProgram.cpp renamed to source/chpt_1_ACppPrimer/aSimpleCppProgram/aSimpleCppProgram.cpp

@@ -0,0 +1,34 @@
+#include <iostream>
+using namespace std;
+
+class Counter {
+private:
+    /* data */
+    int count;
+public:
+    Counter();
+    void increaseBy(int x);
+    int getCount();
+};
+
+Counter::Counter() {
+    count = 0;
+}
+
+void Counter::increaseBy(int x) {
+    count += x;
+}
+
+int Counter::getCount() {
+    return count;
+}
+
+int main() {
+    Counter ctr;                     // an instance of Counter
+    cout << ctr.getCount() << endl;  // prints the initial value (0)
+    ctr.increaseBy(3);               // increase by 3
+    cout << ctr.getCount() << endl;  // prints 3
+    ctr.increaseBy(5);               // increase by 5
+    cout << ctr.getCount() << endl;
+    return 0;
+}

source/chpt_1_ACppPrimer/counter/Counter.cpp

@@ -0,0 +1,28 @@
+#include "CreditCard.h"                      // provides CreditCard
+using namespace std;                         // make std:: accessible
+
+CreditCard::CreditCard(const string& no, const string& nm, int lim, double bal) {
+  number = no;
+  name = nm;
+  balance = bal;
+  limit = lim;
+}
+bool CreditCard::chargeIt(double price) {   // make a charge
+  if (price + balance > double(limit))
+    return false;                          // over limit
+  
+  balance += price;
+  return true;                              // the charge goes through
+}
+
+void CreditCard::makePayment(double payment) { // make a payment
+  balance -= payment;
+}
+                                            // print card information
+ostream& operator<<(ostream& out, const CreditCard& c) {
+  out << "Number = "  << c.getNumber()  << "\n"
+      << "Name = "    << c.getName()    << "\n"
+      << "Balance = " << c.getBalance() << "\n"
+      << "Limit = "   << c.getLimit()   << "\n";
+  return out;
+}

source/chpt_1_ACppPrimer/creditCard/CreditCard.cpp

@@ -0,0 +1,25 @@
+#ifndef CREDIT_CARD_H                          // avoid repeated expansion
+#define CREDIT_CARD_H
+
+#include <string>                              // provides string
+#include <iostream>                            // provides ostream
+
+class CreditCard {
+public:
+  CreditCard(const std::string& no, const std::string& nm, int lim, double bal=0);
+  std::string  getNumber() const  { return number; }
+  std::string  getName() const    { return name; }
+  double       getBalance() const { return balance; }
+  int          getLimit() const   { return limit; }
+
+  bool chargeIt(double price);                 // make a charge
+  void makePayment(double payment);            // make a payment
+private:                                       // private member data
+  std::string  number;                         // credit card number
+  std::string  name;                           // card owner's name
+  int          limit;                          // credit limit
+  double       balance;                        // credit card balance
+};
+
+std::ostream& operator<<(std::ostream& out, const CreditCard& c); // print card information
+#endif

source/chpt_1_ACppPrimer/creditCard/CreditCard.h

@@ -0,0 +1,35 @@
+#include <vector>                                 // provides STL vector
+#include "CreditCard.h"                           // provides CreditCard, cout, string
+
+using namespace std;                              // make std accessible
+
+void testCard() {                                 // CreditCard test function
+  vector<CreditCard*> wallet(10);                 // vector of 10 CreditCard pointers
+  
+  // allocate 3 new cards
+  wallet[0] = new CreditCard("5391 0375 9387 5309", "John Bowman", 2500);
+  wallet[1] = new CreditCard("3485 0399 3395 1954", "John Bowman", 3500);
+  wallet[2] = new CreditCard("6011 4902 3294 2994", "John Bowman", 5000);
+
+  for (int j=1; j <= 16; j++) {                   // make some charges
+     wallet[0]->chargeIt(double(j));              // explicitly cast to double
+     wallet[1]->chargeIt(2 * j);                  // implicitly cast to double
+     wallet[2]->chargeIt(double(3 * j));
+  }
+
+  cout << "Card payments:\n";
+  for (int i=0; i < 3; i++){                      // make more charges
+     cout << *wallet[i];
+     while (wallet[i]->getBalance() > 100.0) {
+      wallet[i]->makePayment(100.0);
+      cout << "New balance = " << wallet[i]->getBalance() << "\n";
+     }
+      cout << "\n";
+      delete wallet[i];                           // deallocate storage
+   }
+}
+
+int main() {                                      // main function
+  testCard();
+  return EXIT_SUCCESS;                            // successful execution
+}