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How could pairing new[] with delete possibly lead to memory leak only?
( POD )freeing memory : is delete[] equal to delete?
使用 gcc 版本 4.1.2 20080704(Red Hat 4.1.2-48)。还没有在 Visual C++ 上测试过它。
似乎 delete 和 delete [] 在删除“简单”类型的数组时效果相同。
char * a = new char[1024];
delete [] a; // the correct way. no memory leak.
char * a = new char[1024];
delete a; // the incorrect way. also NO memory leak.
但是，当删除“复杂”类型的数组时，delete 会导致内存泄漏。
class A
{
public:
int m1;
int* m2; // a pointer!
A()
{
m2 = new int[1024];
}
~A()
{
delete [] m2; // destructor won't be called when using delete
}
};
A* a = new A[1024];
delete [] a; // the correct way. no memory leak.
A* a = new A[1024];
delete a; // the incorrect way. MEMORY LEAK!!!
我的问题是:
- 第一个测试用例，为什么
delete和delete[]在g++下是一样的？ - 在第二个测试用例中，为什么g++不像第一个测试用例那样处理它？</li>