#include <iostream> class A{ public: std::string head; void hello(std::string str){ std::cout<<str<<head<<std::endl; } }; int main() { A a; std::string str="hello"; a.head="888"; a.hello(str); return 0; }
写起来和java差不多,不同的地方在于这里是A a;java是A a=new A();
#include <iostream> class A{ public: std::string head; void hello(std::string str){ std::cout<<str<<head<<std::endl; } }; class B : public A{ }; int main() { B a; std::string str="hello"; a.head="888"; a.hello(str); return 0; }
这就是继承 C++直接用" : "表示了后面要public
C++构造器
#include <iostream> class A{ public: A(){ printf("construction\n"); }; ~A(){ printf("end construction\n"); }; std::string head; void hello(std::string str){ std::cout<<str<<head<<std::endl; } }; class B : public A{ public: B(){ printf("B construction\n"); }; ~B(){ printf("end B construction\n"); }; }; int main() { B a; std::string str="hello"; a.head="888"; a.hello(str); return 0; }
看一下输出,一看就能看懂很简单
construction B construction hello888 end B construction end construction
标签:std,string,继承,C++,construction,public,cout From: https://www.cnblogs.com/Frank-dev-blog/p/17323172.html