141 lines
2.4 KiB
C++
141 lines
2.4 KiB
C++
#include "state.hpp"
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void SolidState::behavior(Water* p_water) const
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{
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cout << "当前状态为固态，温度为" << p_water->getTemperature() << "℃" << endl;
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}
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bool SolidState::isMatch(int stateInfo) const
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{
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return stateInfo <= 0;
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}
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void Liquidtate::behavior(Water* p_water) const
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{
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cout << "当前状态为液态，温度为" << p_water->getTemperature() << "℃" << endl;
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}
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bool Liquidtate::isMatch(int stateInfo) const
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{
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return stateInfo > 0 && stateInfo < 100;
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}
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void GaseousState::behavior(Water* p_water) const
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{
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cout << "当前状态为气态，温度为" << p_water->getTemperature() << "℃" << endl;
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}
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bool GaseousState::isMatch(int stateInfo) const
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{
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return stateInfo >= 100;
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}
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Water::Water()
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{
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addState(new SolidState("固态"));
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addState(new Liquidtate("液态"));
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addState(new GaseousState("气态"));
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setTemperature(25);
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}
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int Water::getTemperature()
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{
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return getStateInfo();
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}
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void Water::setTemperature(int temperature)
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{
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setStateInfo(temperature);
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}
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void Water::riseTemperature(int step)
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{
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setTemperature(getTemperature() + step);
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}
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void Water::reduceTemperature(int step)
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{
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setTemperature(getTemperature() - step);
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}
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void Water::behavior()
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{
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State* p_state = getState();
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p_state->behavior(this);
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}
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string State::getName()
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{
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return m_name;
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}
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Context::Context()
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{
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m_stateInfo = 0;
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p_curState = nullptr;
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}
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Context::~Context()
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{
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vector<State*>::iterator iter = p_states.begin();
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for (; iter != p_states.end(); iter++)
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{
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delete (*iter); // 释放内存
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}
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p_states.clear();
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}
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void Context::addState(State* state)
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{
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vector<State*>::iterator iter = find(p_states.begin(), p_states.end(), state);
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if (iter == p_states.end())
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{
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p_states.push_back(state);
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}
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}
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bool Context::changeState(State* state)
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{
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vector<State*>::iterator iter = find(p_states.begin(), p_states.end(), state);
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if (iter == p_states.end())
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{
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return false;
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}
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if (p_curState == nullptr)
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{
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cout << "初始化为 " << state->getName() << endl;
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}
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else
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{
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cout << "由 " << p_curState->getName() << " 变为 " << state->getName() << endl;
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}
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p_curState = state;
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return true;
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}
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State* Context::getState()
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{
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return p_curState;
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}
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void Context::setStateInfo(int stateInfo)
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{
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m_stateInfo = stateInfo;
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for (vector<State*>::iterator iter = p_states.begin(); iter != p_states.end(); iter++)
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{
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if ((*iter)->isMatch(stateInfo))
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{
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changeState((*iter));
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break;
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}
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}
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}
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int Context::getStateInfo()
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{
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return m_stateInfo;
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}
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