在程序中增加相应的内存检测工具 

#define CRTDBG MAP ALLOC
#include <stdlib.h>
#include <crtdbg.h>

#ifdef DEBUG
#ifndef DBGNEW
#define DBG_NEW new (_NORMAL_BLOCK，_FILE_LINE_)
#define new DBG NEW
#endif
#endif

_CrtDumpMemoryLeaks();

当没有释放内存时候：

#define _CRT_SECURE_NO_WARNINGS

#define CRTDBG MAP ALLOC
#include <stdlib.h>
#include <crtdbg.h>

#include<iostream>
#include<stdio.h>
#include<Windows.h>




#ifdef DEBUG
#ifndef DBGNEW
#define DBG_NEW new (_NORMAL_BLOCK，_FILE_LINE_)
#define new DBG NEW
#endif
#endif

using namespace std;

void A_live() {
	int* p = new int[1024];

	//挥霍
	p[0] = 0;

	//申请的内存必须释放
	//delete[] p;
}

int main() {
	for (int i = 0; i < 5; i++)
	{
		A_live();
		Sleep(50);

		_CrtDumpMemoryLeaks();
		system("pause");
		return 0;
	}

}

增加了delete时候：

#define _CRT_SECURE_NO_WARNINGS

#define CRTDBG MAP ALLOC
#include <stdlib.h>
#include <crtdbg.h>

#include<iostream>
#include<stdio.h>
#include<Windows.h>




#ifdef DEBUG
#ifndef DBGNEW
#define DBG_NEW new (_NORMAL_BLOCK，_FILE_LINE_)
#define new DBG NEW
#endif
#endif

using namespace std;

void A_live() {
	int* p = new int[1024];

	//挥霍
	p[0] = 0;

	//申请的内存必须释放
	delete[] p;
}

int main() {
	for (int i = 0; i < 5; i++)
	{
		A_live();
		Sleep(50);

		_CrtDumpMemoryLeaks();
		system("pause");
		return 0;
	}

}