为什么在使用c++ queue时内存泄漏？

Question

在使用C++头文件queue时出现内存泄漏

#include<iostream>
#include<queue>
using namespace std;
int main()
{
    queue<int> fq;
    for (int i = 0; i < 10; i++)
    {
        fq.push(i);
    }
    while (!fq.empty())
    {
        cout << fq.front() << endl;
        fq.pop();
    }
    _CrtDumpMemoryLeaks();
    system("pause");
    return 0;
}

在使用VS2017 Debug时控制台输出如下：

Detected memory leaks!
Dumping objects ->
{155} normal block at 0x011DE6B0, 16 bytes long.
 Data: <                > 08 00 00 00 09 00 00 00 CD CD CD CD CD CD CD CD 
{154} normal block at 0x011DE670, 16 bytes long.
 Data: <                > 04 00 00 00 05 00 00 00 06 00 00 00 07 00 00 00 
{153} normal block at 0x011E3918, 16 bytes long.
 Data: <                > 00 00 00 00 01 00 00 00 02 00 00 00 03 00 00 00 
{152} normal block at 0x011DFA38, 32 bytes long.
 Data: < 9  p           > 18 39 1E 01 70 E6 1D 01 B0 E6 1D 01 00 00 00 00 
{151} normal block at 0x011E5128, 8 bytes long.
 Data: <,       > 2C FA 18 01 00 00 00 00 
Object dump complete.

所以这是为什么？

Answer 1

这段代码是没有内存泄漏的，之所以会报内存泄漏是因为你这些队列里面的变量在函数返回之前还是在栈上的，在函数返回之后才会被释放，
这时候你用_CrtDumpMemoryLeaks() 是会报内存泄漏的。