添加class的demo

base/.gitignore

@@ -4,4 +4,5 @@
 .vscode
 /cmake-build-debug
 *.o
+*.exe
 

base/CMakeLists.txt

@@ -47,6 +47,14 @@ add_executable(external namespacetest/external.cpp)
 add_executable(support namespacetest/support.cpp)
 add_executable(ststic namespacetest/ststic.cpp)
 add_executable(newplace namespacetest/newplace.cpp)
+<<<<<<< HEAD
 add_executable(namessp namespacetest/namessp.cpp)
+add_executable(usestock0 class/usestock0.cpp)
 add_executable(stock20 class/stock20.cpp)
-add_executable(useStock20 class/useStock20.cpp)
+add_executable(useStock20 class/useStock20.cpp)
+=======
+add_executable(namessp namespacetest/namessp.cpp)
+>>>>>>> parent of 39fe553 (添加对象)
+=======
+add_executable(namessp namespacetest/namessp.cpp)
+>>>>>>> parent of 39fe553 (添加对象)

base/abstract/stack.cpp

@@ -1,34 +0,0 @@
-//
-// Created by zhuyijun on 2021/8/17.
-//
-
-
-#include "stack.h"
-
-Stack::Stack() {
-    top = 0;
-}
-
-bool Stack::isempty() const {
-    return top == 0;
-}
-
-bool Stack::isfull() const {
-    return top == MAX;
-}
-
-bool Stack::push(const Item &item) {
-    if (top < MAX) {
-        items[top++] = item;
-        return true;
-    }
-    return false;
-}
-
-bool Stack::pop(Item &item) {
-    if (top > 0) {
-        item = items[--top];
-        return true;
-    }
-    return false;
-}

base/abstract/stack.h

@@ -1,29 +0,0 @@
-//
-// Created by zhuyijun on 2021/8/17.
-//
-
-#ifndef BASE_STACK_H
-#define BASE_STACK_H
-
-typedef unsigned long Item;
-
-class Stack {
-private:
-    enum {MAX=10};
-    Item items[MAX];
-    int top;
-public:
-    //构造函数
-    Stack();
-    //判断栈是否为空
-    bool isempty() const;
-    //判断栈是否满了
-    bool isfull() const;
-    //入栈
-    bool push(const Item & item);
-    //出栈
-    bool pop(Item & item);
-};
-
-
-#endif //BASE_STACK_H

base/abstract/stacker.cpp

@@ -1,50 +0,0 @@
-//
-// Created by zhuyijun on 2021/8/17.
-//
-
-#include <iostream>
-#include <cctype>
-#include "stack.h"
-
-using namespace std;
-
-int main() {
-    Stack st;
-    char ch;
-    unsigned long po;
-    cout << "Please enter A to add a purchase order,\n Pto process a PO,or Q to quit.\n";
-    while (cin >> ch && toupper(ch) != 'Q') {
-        while (cin.get() != '\n') {
-            continue;
-        }
-        if (!isalpha(ch)) {
-            cout << '\a';
-            continue;
-        }
-        switch (ch) {
-            case 'A':
-            case 'a':
-                cout << "Enter a PO number to add: ";
-                cin >> po;
-                if (st.isfull())
-                    cout << "stack already full";
-                else
-                    st.push(po);
-                break;
-            case 'P':
-            case 'p':
-                if (st.isempty())
-                    cout << "stack already empty \n";
-                else {
-                    st.pop(po);
-                    cout << "PO #" << po << " popped\n";
-                }
-                break;
-        }
-        cout << "Please enter A to add a purchase order,\n "
-                "P to process a PO, or Q to quit,\n";
-    }
-    cout << "Bye\n";
-    return 0;
-}
-

base/class/stock00.cpp

@@ -1,21 +1,35 @@
-//
-// Created by zhuyijun on 2021/8/17.
-//
 
 #include <iostream>
-#include "stock20.h"
+#include "stock00.h"
 
+//构造函数
 Stock::Stock() {
     company = "no name";
     shares = 0;
     share_val = 0.0;
-    total_val = -0.0;
+    total_val = 0.0;
 }
 
 Stock::Stock(const std::string &co, long n, double pr) {
     company = co;
     if (n < 0) {
-        std::cout << "Number of shares can't be nagetive; " << company << " shares set to 0." << std::endl;
+        std::cout << "Number of shares can't be negative; " << company << " shares set to 0.\n";
+    } else {
+        shares = n;
+    }
+    share_val = pr;
+    set_tot();
+}
+
+//使用inline限定符 使其成为内联函数
+inline void Stock::set_tot() {
+    total_val = shares * share_val;
+}
+
+void Stock::acquire(const std::string &co, long n, double pr) {
+    company = co;
+    if (n < 0) {
+        std::cout << "Number of shares can't be negative; " << company << " shares set to 0.\n";
         shares = 0;
     } else {
         shares = n;
@@ -24,17 +38,9 @@ Stock::Stock(const std::string &co, long n, double pr) {
     set_tot();
 }
 
-inline void Stock::set_tot() {
-    total_val = shares * share_val;
-}
-
-Stock::~Stock() {
-    std::cout << "run " << company << " ~Stock" << std::endl;
-}
-
 void Stock::buy(long num, double price) {
     if (num < 0) {
-        std::cout << "Number of shares purchased can't be negative. Transaction is  aborted." << std::endl;
+        std::cout << "Number of shares purchased can't be negative." << "Transaction is aborted.\n";
     } else {
         shares += num;
         share_val = price;
@@ -45,11 +51,11 @@ void Stock::buy(long num, double price) {
 void Stock::sell(long num, double price) {
     using std::cout;
     if (num < 0) {
-        std::cout << "Number of shares purchased can't be negative. Transaction is  aborted." << std::endl;
+        std::cout << "Number of shares purchased can't be negative." << "Transaction is aborted.\n";
     } else if (num > shares) {
-        std::cout << "You can't sell more than you have! Transaction is  aborted." << std::endl;
+        cout << "You can't sell more than you have! " << "Transaction is aborted.\n";
     } else {
-        shares -= num;
+        shares += num;
         share_val = price;
         set_tot();
     }
@@ -60,24 +66,16 @@ void Stock::update(double price) {
     set_tot();
 }
 
-void Stock::show() const {
+void Stock::show() {
     using std::cout;
-    using std::endl;
     using std::ios_base;
     ios_base::fmtflags orig = cout.setf(ios_base::fixed, ios_base::floatfield);
     std::streamsize prec = cout.precision(3);
-    cout << "Company: " << company << endl;
-    cout << "shares: " << shares << endl;
-    cout << "Share Price: $" << share_val << endl;
+    cout << "Company: " << company
+         << " Shares: " << shares << std::endl;
+    cout << " Share Price: $" << share_val;
     cout.precision(2);
-    cout << "Total Worth: $" << total_val << endl;
+    cout << " Total Worth: $" << total_val << std::endl;
     cout.setf(orig, ios_base::floatfield);
     cout.precision(prec);
-}
-
-const Stock &Stock::topval(const Stock &s) const {
-    if (s.total_val > total_val) {
-        return s;
-    }
-    return *this;
 }

base/class/stock00.h

@@ -0,0 +1,38 @@
+//
+// Created by nicemoe on 2021/8/16.
+//
+
+#ifndef BASE_STOCK00_H
+#define BASE_STOCK00_H
+
+#include <string>
+
+class Stock {
+    //私有
+private:
+    std::string company;
+    long shares;
+    double share_val;
+    double total_val;
+
+//    void set_tot() {
+//        total_val = shares * share_val;
+//    }
+    void set_tot();
+//公有
+public:
+    Stock();
+    Stock(const std::string &co, long n = 0, double pr = 0.0);
+
+    void acquire(const std::string &co, long n, double pr);
+
+    void buy(long num, double price);
+
+    void sell(long num, double price);
+
+    void update(double price);
+
+    void show();
+};
+
+#endif //BASE_STOCK00_H

base/class/stock10.cpp

@@ -0,0 +1,85 @@
+
+#include <iostream>
+#include "stock10.h"
+
+//构造函数
+Stock::Stock() {
+    company = "no name";
+    shares = 0;
+    share_val = 0.0;
+    total_val = 0.0;
+}
+
+Stock::Stock(const std::string &co, long n, double pr) {
+    company = co;
+    if (n < 0) {
+        std::cout << "Number of shares can't be negative; " << company << " shares set to 0.\n";
+    } else {
+        shares = n;
+    }
+    share_val = pr;
+    set_tot();
+}
+
+//使用inline限定符 使其成为内联函数
+inline void Stock::set_tot() {
+    total_val = shares * share_val;
+}
+
+Stock::~Stock() {
+    std::cout << "Bye, " << company << " !\n";
+}
+
+void Stock::acquire(const std::string &co, long n, double pr) {
+    company = co;
+    if (n < 0) {
+        std::cout << "Number of shares can't be negative; " << company << " shares set to 0.\n";
+        shares = 0;
+    } else {
+        shares = n;
+    }
+    share_val = pr;
+    set_tot();
+}
+
+void Stock::buy(long num, double price) {
+    if (num < 0) {
+        std::cout << "Number of shares purchased can't be negative." << "Transaction is aborted.\n";
+    } else {
+        shares += num;
+        share_val = price;
+        set_tot();
+    }
+}
+
+void Stock::sell(long num, double price) {
+    using std::cout;
+    if (num < 0) {
+        std::cout << "Number of shares purchased can't be negative." << "Transaction is aborted.\n";
+    } else if (num > shares) {
+        cout << "You can't sell more than you have! " << "Transaction is aborted.\n";
+    } else {
+        shares += num;
+        share_val = price;
+        set_tot();
+    }
+}
+
+void Stock::update(double price) {
+    share_val = price;
+    set_tot();
+}
+//后面加const保证对象不被修改
+void Stock::show() const {
+    using std::cout;
+    using std::ios_base;
+    ios_base::fmtflags orig = cout.setf(ios_base::fixed, ios_base::floatfield);
+    std::streamsize prec = cout.precision(3);
+    cout << "Company: " << company
+         << " Shares: " << shares << std::endl;
+    cout << " Share Price: $" << share_val;
+    cout.precision(2);
+    cout << " Total Worth: $" << total_val << std::endl;
+    cout.setf(orig, ios_base::floatfield);
+    cout.precision(prec);
+}

base/class/stock10.h

@@ -1,28 +1,31 @@
 //
-// Created by zhuyijun on 2021/8/17.
+// Created by nicemoe on 2021/8/16.
 //
 
-#ifndef BASE_STOCK20_H
-#define BASE_STOCK20_H
+#ifndef BASE_STOCK10_H
+#define BASE_STOCK10_H
 
 #include <string>
 
 class Stock {
-
+    //私有
 private:
     std::string company;
-    int shares;
+    long shares;
     double share_val;
-    double total_val{};
+    double total_val;
 
+//    void set_tot() {
+//        total_val = shares * share_val;
+//    }
     void set_tot();
-
+//公有
 public:
     Stock();
-
+    ~Stock();
     Stock(const std::string &co, long n = 0, double pr = 0.0);
 
-    ~Stock();
+    void acquire(const std::string &co, long n, double pr);
 
     void buy(long num, double price);
 
@@ -31,9 +34,6 @@ public:
     void update(double price);
 
     void show() const;
-
-    const Stock &topval(const Stock &s) const;
 };
 
-
-#endif //BASE_STOCK20_H
+#endif //BASE_STOCK10_H

base/class/useStock20.cpp

@@ -1,30 +0,0 @@
-//
-// Created by zhuyijun on 2021/8/17.
-//
-
-#include <iostream>
-#include "stock20.h"
-
-const int STKS =4;
-
-int main() {
-    Stock stock[STKS]{
-        Stock("NanoSmart",12,20.0),
-        Stock("Boffo Objects",200,2.0),
-        Stock("Monolithic Obelisks",130,3.25),
-        Stock("Fleep Enterprises",60,6.5)
-    };
-    std::cout <<"Stock holdings: \n";
-    int st;
-    for (st = 0; st < STKS; ++st) {
-        stock[st].show();
-    }
-    const Stock * top = &stock[0];
-    for (st = 1; st < STKS; ++st) {
-        top = &top ->topval(stock[st]);
-    }
-    std::cout<< "\n the most valuble holding:\n";
-    top->show();
-    return 0;
-}
-

base/class/usestock0.cpp

@@ -0,0 +1,25 @@
+//
+// Created by nicemoe on 2021/8/16.
+//
+
+#include  <iostream>
+#include "stock00.h"
+/**
+ * 编译命令 g++ .\stock00.cpp .\usestock0.cpp -o usestock
+
+ * @return
+ */
+int main() {
+    Stock fluffy_the_cat;
+    fluffy_the_cat.acquire("NanoSmart",20,12.50);
+    fluffy_the_cat.show();
+    fluffy_the_cat.buy(15,18.125);
+    fluffy_the_cat.show();
+    fluffy_the_cat.sell(400,20.00);
+    fluffy_the_cat.show();
+    fluffy_the_cat.buy(300000,40.125);
+    fluffy_the_cat.show();
+    fluffy_the_cat.sell(300000,0.125);
+    fluffy_the_cat.show();
+    return 0;
+}

base/class/usestock2.cpp

@@ -0,0 +1,34 @@
+//
+// Created by nicemoe on 2021/8/16.
+//
+
+#include  <iostream>
+#include "stock10.h"
+
+/**
+ * 编译命令 g++ .\stock10.cpp .\usestock2.cpp -o usestock
+
+ * @return
+ */
+int main() {
+    {
+        using std::cout;
+        cout << "Using constructors to create new Objects \n";
+        Stock stock1("NanoSmart", 12, 20.0);
+        stock1.show();
+        Stock stock2 = Stock("Boffo Objects", 2, 2.0);
+        stock2.show();
+
+        cout << "Assigning stock1 to stock2:\n";
+        stock2 = stock1;
+        cout << "Listing stock1 and stock2:\n";
+        stock1.show();
+        stock2.show();
+        cout << "Using a constructor to reset an object\n";
+        stock1 = Stock("Nifty Foods", 10, 50.0);
+        cout << "Revised stock1:\n";
+        stock1.show();
+        cout << "Done\n";
+    }
+    return 0;
+}