C++中exit return 区别

C++中exit return 区别

exit()退出程序,把控制权交给OS 
return结束当前函数,返回函数值,把控制权交给调用函数
在main函数中return 与exit用法差不多，

但return会自动调用对象的析构函数, 而exit不会

      

        1 
       #include 
       <
       iostream
       >
       

        2 
       using
        
       namespace
        std;

        3 
       class
        Temp

        4 
       {

        5 
       public
       :

        6 
           Temp(){cout
       <<
       "
       Constructor!
       "
       <<
       endl;}

        7 
           
       ~
       Temp(){cout
       <<
       "
       Destructor!
       "
       <<
       endl;}

        8 
       };

        9 
       int
        main()

       10 
       {   

       11 
           Temp t;

       12 
           exit(
       0
       ) ;

       13 
       }
      

 

     

       Constructor
      !
      
Press any key to 
      continue
     

 

 

      

        1 
       #include 
       <
       iostream
       >
       

        2 
       using
        
       namespace
        std;

        3 
       class
        Temp

        4 
       {

        5 
       public
       :

        6 
           Temp(){cout
       <<
       "
       Constructor!
       "
       <<
       endl;}

        7 
           
       ~
       Temp(){cout
       <<
       "
       Destructor!
       "
       <<
       endl;}

        8 
       };

        9 
       int
        main()

       10 
       {   

       11 
           Temp t;

       12 
           
       return
        
       0
       ;

       13 
       }
      

     

      Constructor
      !
      
Destructor
      !
      
Press any key to 
      continue