第九周。

OOP/09/Exercise01.cpp

@@ -0,0 +1,35 @@
+#include <iostream>
+#include <iomanip>
+
+std::string setMiddle(int width, std::string fillChar, std::string originString) {
+    int len = originString.length();
+    if (len >= width) {
+        return originString;
+    }
+    int fill = (width - len) / 2;
+    std::string result = "";
+    for (int i = 0; i < fill; i++) {
+        result += fillChar;
+    }
+    result += originString;
+    for (int i = result.length(); i < width; i++) {
+        result += fillChar;
+    }
+    return result;
+}
+
+int main() {
+    std::cout << std::setfill('+') << std::setw(60) << "" << std::endl;
+    std::cout << "+" << setMiddle(58, " ", "Contoso Company Employee Management System") << "+" << std::endl;
+    std::cout <<std::setfill('+') << std::setw(60) << "" << std::endl;
+
+    std::cout << "\n";
+
+    std::cout << setMiddle(60, " ", "Main menu") << "\n";
+    std::cout << setMiddle(60, " ", "1. Import data") << "\n";
+    std::cout << setMiddle(60, " ", "2. Search data") << "\n";
+    std::cout << setMiddle(60, " ", "3. Save data  ") << "\n";
+    std::cout << setMiddle(60, " ", "4. Quit       ") << "\n";
+    std::cout << setMiddle(60, " ", "Please Select:") << std::endl;
+    return 0;
+}

OOP/09/Exercise02.cpp

@@ -0,0 +1,20 @@
+#include <iostream>
+#include <iomanip>
+
+int main() {
+    double x = 123.456;
+    std::cout.width(10);
+    std::cout.setf(std::ios::dec, std::ios::basefield);
+    std::cout << x << std::endl;
+    std::cout.setf(std::ios::left);
+    std::cout << x << std::endl;
+    std::cout.width(15);
+    std::cout.setf(std::ios::right);
+    std::cout << x << std::endl;
+    std::cout.setf(std::ios::showpos);
+    std::cout << x << std::endl;
+    std::cout << -x << std::endl;
+    std::cout.setf(std::ios::scientific);
+    std::cout << x << std::endl;
+    return 0;
+}

OOP/09/Optional01.cpp

@@ -0,0 +1,16 @@
+#include <iostream>
+
+int main() {
+    std::string str1;
+    char str2[101], str3[101];
+    std::cin >> str1;
+    std::cin.ignore(100, '\n');
+
+    std::cin.get(str2, 100, '\n');
+    std::cin.ignore();
+
+    std::cin.getline(str3, 100, '\n');
+
+    std::cout << "str1:\n" << str1 << "\nstr2:\n" << str2 << "\nstr3:\n" << str3 << std::endl;
+    return 0;
+}

OOP/test.cpp

@@ -1,52 +1,60 @@
 #include <iostream>
 
-class Complex {
+class A {
 protected:
-    int real, im;
+    int a;
 
 public:
-    Complex();
+    A(int _a) : a(_a) {
-    Complex(int real, int im);
+    }
-    Complex(Complex &other);
-
-    void operator=(Complex &other);
-    Complex& operator+(Complex &other);
     void display() {
-        std::cout << this->real << "+" << this->im << "i" << std::endl;
+        std::cout << a << std::endl;
     }
 };
 
-Complex::Complex() {
+class B : virtual public A {
-    this->real = 0;
+protected:
-    this->im = 0;
+    int b;
-}
 
-Complex::Complex(int newReal, int newIm) {
+public:
-    this->real = newReal;
+    B(int _a, int _b) : A(_a+1), b(_b) {
-    this->im = newIm;
+    }
-}
+    void display() {
+        A::display();
+        std::cout << b << std::endl;
+    }
+};
 
-Complex::Complex(Complex &other) {
+class C : virtual public A {
-    this->real = other.real;
+protected:
-    this->im = other.im;
+    int c;
-}
 
-void Complex::operator=(Complex &other) {
+public:
-    this->real = other.real;
+    C(int _a, int _c) : A(_a + 2), c(_c) {
-    this->im = other.im;
+    }
-}
+    void display() {
+        A::display();
+        std::cout << c << std::endl;
+    }
+};
 
-Complex& Complex::operator+(Complex &other) {
+class D : public B, public C {
-    Complex tmp(this->real + other.real, this->im + other.im);
+protected:
-    return tmp;
+    int d;
-}
+
+public:
+    D(int _a, int _b, int _c, int _d) :A(_a), B(_a, _b), C(_a, _c), d(_d){};
+
+    void display() {
+        A::display();
+        B::display();
+        C::display();
+        std::cout << d << std::endl;
+    }
+};
 
 int main() {
-    Complex i1(1,2);
+    D objD(1, 2, 3, 4);
-    Complex i2;
+    objD.display();
-    int a[3][5] = {0};
-    int (*ptr)[5] = (int(*)[5]) a[3];
-    i2 = i1 + i1;
-    i2.display();
     return 0;
 }