C++简单工厂模式（Simple Factory Pattern）实现

来源：互联网发布：java内存溢出编辑：程序博客网时间：2024/06/01 17:55

#ifndef CHART_H#define CHART_H#include <iostream>#include <string>class Chart{    public:        virtual void display()  = 0;    };class HistogramChart : public Chart{    public:         HistogramChart() {            std::cout << "Historgram constructor" << std::endl;         }        void display() {            std::cout << "show Histogram" << std::endl;         }};class PieChart: public Chart{    public:         PieChart() {            std::cout << "Piechart constructor" << std::endl;           }        void display() {            std::cout << "show Piechart" << std::endl;         }};class LineChart: public Chart{    public:         LineChart() {            std::cout << "Linechart constructor" << std::endl;          }        void display() {            std::cout << "show Linechart" << std::endl;         }};class ChartFactory{    public:        static Chart* getChart(const std::string& strName) {            Chart* p = NULL;            if (strName == "histogramchart") {                p = new HistogramChart;             } else if (strName == "piechart") {                p = new PieChart;            } else if (strName == "linechart") {                p = new LineChart;            }            return p;        }};#endif

#include "Chart.h"void test(){    Chart* p = ChartFactory::getChart(std::string("histogramchart"));       p->display();    p = ChartFactory::getChart(std::string("piechart"));    p->display();    p = ChartFactory::getChart(std::string("linechart"));    p->display();}int main(){    test();}

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