c++ - 如何删除C++中的变量

Question

我想在我的程序中释放内存。

虽然我是新手，但我非常关心性能。

string i_want_to_delete_this = "I don't want this cleared, but            
completely gone";
/* I figured out */ i_want_to_delete_this.clear() /* simply sets the
string value to "". I want to be able to do this with every
datatype! I want it completely gone, not even declared anymore. */

Answer 1

我不明白你为什么要这样做，并且在任何情况下你都不能删除或以其他方式删除命名变量，除非它们在概念上由编译器在它们超出范围时为你删除，并且当包含它们的函数退出时实际上被删除。例如:

{
   {
       string i_want_to_delete_this = "I don't want this cleared, but            
completely gone";
   }     // it's gone
}