59 lines
1.2 KiB
C++
59 lines
1.2 KiB
C++
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#include <iostream>
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#include <vector>
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#include <string>
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#include <memory>
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#include <algorithm>
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class Person {
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public:
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Person(int id, std::string name)
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: id_(id), name_(std::move(name)) {}
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int id() const { return id_; }
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const std::string& name() const { return name_; }
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virtual void greet() const {
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std::cout << "Hello, I'm " << name_ << std::endl;
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}
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virtual ~Person() = default;
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private:
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int id_;
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std::string name_;
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};
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class Student : public Person {
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public:
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Student(int id, std::string name, double gpa)
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: Person(id, std::move(name)), gpa_(gpa) {}
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void greet() const override {
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std::cout << "Hi, I'm " << name() << " (GPA: " << gpa_ << ")" << std::endl;
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}
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private:
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double gpa_;
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};
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template <typename T>
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T max_value(T a, T b) {
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return (a > b) ? a : b;
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}
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int main() {
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auto p = std::make_unique<Student>(1, "Alice", 3.9);
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p->greet();
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std::vector<int> nums = {3, 1, 4, 1, 5, 9};
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std::sort(nums.begin(), nums.end());
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for (int n : nums) {
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std::cout << n << " ";
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}
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std::cout << std::endl;
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std::cout << "Max of 10 and 20: " << max_value(10, 20) << std::endl;
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return 0;
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}
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