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  • 动态内存 this指针

    #include <iostream>
    #include <string>
    
    class Company
    {
    public:
        Company(std::string theName);
        virtual void printInfo();
    
    protected:
        std::string name;
    };
    
    class TechCompany : public Company
    {
    public:
        TechCompany(std::string theName, std::string product);
        virtual void printInfo();
    private:
        std::string product;
    };
    
    Company::Company(std::string theName)
    {
        name = theName;
    };
    
    void Company::printInfo()
    {
        std::cout << "this company's name is " << name << std::endl;
    };
    
    //TechCompany::TechCompany(std::string theName, std::string theproduct) : Company(theName)
    //{
    //  product = theproduct;
    //{
    TechCompany::TechCompany(std::
    string theName, std::string product) : Company(theName) { this->product = product; // this指针:指向当前的类生成的对象的指针,所以就可以用 -> 区分属性 和 函数参数值了。如果不存在二义性,就不必使用this。 }; void TechCompany::printInfo() { std::cout << "this company's name is " << name << " his product is " << product << std::endl; } int main() { Company *company = new Company("Apple"); company->printInfo(); delete company; company = NULL; company = new TechCompany("Apple", "Iphone"); company->printInfo(); delete company; company = NULL; } /* vim: set ts=4 sw=4 sts=4 tw=100 */
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  • 原文地址:https://www.cnblogs.com/i80386/p/4356900.html
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