C风格new操作符malloc，如何调用构造函数

keywords：C++, new, placement new 原文： http://stackoverflow.com/questions/4956249/using-malloc-instead-of-new-and-calling-the-copy-constructor-when-the-object-is You’ll need to use placement new after getting the raw memory from malloc. void* mem = malloc(sizeof(S)); S* s = new (mem) S(); //this is the so called "placement new" When you’re done with the object you have to make sure to explicitly call its destructor. s->~S(); free(mem);...

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