c++ - 映射类导致内存泄漏

Question

 int main()
    {
    map<string,string> x;
    x["Haitham"]="000@hotmail.com";
    x.clear();

    _CrtDumpMemoryLeaks();
    return 0;
    }

when i test for memory leaks for this program the output is Detected memory leaks!

{152} normal block at 0x0070ABD8, 8 bytes long.

Data: <4 p > 34 AB 70 00 00 00 00 00

{151} normal block at 0x0070AB90, 8 bytes long.

{150} normal block at 0x0070AB08, 72 bytes long.

Data: <p p ` p > 60 A9 70 00 60 A9 70 00 60 A9 70 00 01 00 CD CD

{145} normal block at 0x00704C40, 8 bytes long.

Data: < ^ > E4 FE 5E 00 00 00 00 00

{144} normal block at 0x0070A960, 72 bytes long.

Data: < p p p > 08 AB 70 00 08 AB 70 00 08 AB 70 00 01 01 CD CD

Data: < p > 18 AB 70 00 00 00 00 00

Object dump complete.

Answer 1

这个问题是因为您过早地调用了检查内存泄漏的函数。在您调用 _CrtDumpMemoryLeaks 时，map 尚未被销毁。

将您的代码更改为:

int main()
{
    {
        map<string,string> x;
        x["Haitham"]="000@hotmail.com";
        x.clear();
    }
    _CrtDumpMemoryLeaks();
    return 0;
}

这应该表明 map 已被销毁，因为它位于 { } block 的本地。