c++打印Hello World

c++打印Hello World

编写一个创建时,就在屏幕上打印Hello,消失时,就打印Goodbye 的C++程序.

#include < iostream >
using namespace std;

class  World{
         public :
                World(){ // 创建时
                        std::cout << " Hello!\n " ;
                }
                 ~ World(){ // 消失时
                        std::cout << " Goodbye!\n " ;
                }
};

//World theWorld;

int  main(){
        //cout << " Hello World\n " ;
        World theWorld;
         return   0 ;
}

[root@portal ctest]# vi hello.c
[root@portal ctest]# g ++  hello.c  - o hello
[root@portal ctest]# . / hello
Hello !
Goodbye !
[root@portal ctest]#