除语法和 free 与 delete ，

1. 您可以方便地替换 :: operator new ;


2. malloc 带有 realloc ，而 new 没有等效项;


3. new 具有 new_handler ，没有 malloc

1. you can portably replace ::operator new;
2. malloc comes with realloc, for which new has no equivalent;
3. new has the concept of a new_handler, for which there is no malloc equivalent.

（替换 m alloc 打开可以蠕虫。可以做到，但不能移植，因为它需要链接程序的知识。）

(Replacing malloc opens up a can of worms. It can be done, but not portably, because it requires knowledge of the linker.)