93 lines
2.2 KiB
C++
93 lines
2.2 KiB
C++
#include <algorithm>
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#include <cassert>
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#include <functional>
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#include <iostream>
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#include <memory>
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#include <set>
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#include <vector>
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class AmmunitionVisitor;
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class Ammunition {
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public:
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Ammunition(size_t amount)
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: _amount(amount) {}
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virtual ~Ammunition() = default;
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virtual void accept(const AmmunitionVisitor&) = 0;
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size_t amount() const { return _amount; }
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private:
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size_t _amount = 0;
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};
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class RoundShot;
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class ChainShot;
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class GrapeShot;
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class AmmunitionVisitor {
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public:
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virtual ~AmmunitionVisitor() = default;
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virtual void visit(const RoundShot&) const = 0;
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virtual void visit(const ChainShot&) const = 0;
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virtual void visit(const GrapeShot&) const = 0;
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};
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class RoundShot : public Ammunition {
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public:
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using Ammunition::Ammunition;
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void accept(const AmmunitionVisitor& visitor) {
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visitor.visit(*this);
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}
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};
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class ChainShot : public Ammunition {
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public:
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using Ammunition::Ammunition;
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void accept(const AmmunitionVisitor& visitor) {
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visitor.visit(*this);
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}
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};
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class GrapeShot : public Ammunition {
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public:
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using Ammunition::Ammunition;
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void accept(const AmmunitionVisitor& visitor) {
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visitor.visit(*this);
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}
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};
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class DamageVisitor : public AmmunitionVisitor {
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public:
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void visit(const RoundShot& shot) const override {
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std::cout << "Round shot make 20 damages\n";
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}
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void visit(const ChainShot& shot) const override {
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std::cout << "Chain shot make 30 damages\n";
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}
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void visit(const GrapeShot& shot) const override {
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std::cout << "Grape shot make 40 damages\n";
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}
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};
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class SoundVisitor : public AmmunitionVisitor {
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public:
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void visit(const RoundShot& shot) const override {
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std::cout << "Fiuuuuuuuu Bam!\n";
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}
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void visit(const ChainShot& shot) const override {
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std::cout << "Fiuuuuuuuuuuu Bam bam!\n";
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}
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void visit(const GrapeShot& shot) const override {
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std::cout << "Fiuuuuuuuuuuu Bam bam bam bam bam!\n";
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}
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};
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int main() {
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std::unique_ptr<Ammunition> grapeShot = std::make_unique<GrapeShot>(100);
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SoundVisitor soundVisitor;
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DamageVisitor damageVisitor;
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grapeShot->accept(soundVisitor);
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grapeShot->accept(damageVisitor);
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}
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