C++中const关键字用法详解及实例和源码下载

#include<iostream> #include<string> using namespace std; class Test1{ public: Test1(int,string); void display() const; void setvalue(int) const; private: int age; string name; }; Test1::Test1(int a,string nam){ age = a; name = nam; } void Test1::display() const{ cout<<"age="<<age<<",name="<<name<<endl; } //void Test1::setvalue(int a) const{ // age = a; //} /*int main(){ Test1 test1(23,"ddee"); test1.display(); const Test1 * pp = &test1; Test1 const * pp1 = &test1; (*pp).display(); (*pp1).display(); pp->display(); pp1->display(); cout<<"=======分隔符========="<<endl; Test1 const test2(25,"ffee"); test2.display(); const Test1 * pp2 = &test2; pp2->display(); //改变指针pp的值 cout<<"改变指针pp的值"<<endl; pp = &test2; pp->display(); // pp->setvalue(12); // pp->display(); return 0; }*/