_______VC中检测内存泄露的代码:
在申请了动态内存空间后常常会忘记在不用的时候释放,这样会造成内存的浪费等其他问题。怎样检查你的代码有没有内存泄露呢? 需要在前面加上这些代码:
#ifdef _DEBUG
#define DEBUG_CLIENTBLOCK new( _CLIENT_BLOCK, __FILE__, __LINE__)
#else
#define DEBUG_CLIENTBLOCK
#endif
#define _CRTDBG_MAP_ALLOC
#include <stdlib.h>
#include <crtdbg.h>
#include <string.h>
#include <stdio.h>
#ifdef _DEBUG
#define new DEBUG_CLIENTBLOCK
#endif
然后在要检测的代码前面加上:
_CrtSetDbgFlag ( _CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF );
在后面加上:
_CrtDumpMemoryLeaks();
如:
#ifdef _DEBUG
#define DEBUG_CLIENTBLOCK new( _CLIENT_BLOCK, __FILE__, __LINE__)
#else
#define DEBUG_CLIENTBLOCK
#endif
#define _CRTDBG_MAP_ALLOC
#include <stdlib.h>
#include <crtdbg.h>
#include <string.h>
#include <stdio.h>
#ifdef _DEBUG
#define new DEBUG_CLIENTBLOCK
#endif
int main()
{
_CrtSetDbgFlag ( _CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF );
int *p;
p = new int;
_CrtDumpMemoryLeaks();
return 0;
}
然后按F5进行调试,会发现输出框中显示:
Detected memory leaks!
Dumping objects ->
e:\microsoft visual c++\myprojects\临时\main.cpp(20) : {41} client block at 0x003707B8, subtype 0, 4 bytes long.
Data: < > CD CD CD CD
Object dump complete.
Detected memory leaks!
Dumping objects ->
e:\microsoft visual c++\myprojects\临时\main.cpp(20) : {41} client block at 0x003707B8, subtype 0, 4 bytes long.
Data: < > CD CD CD CD
Object dump complete.
The thread 0xD18 has exited with code 0 (0x0).
就说明有内存泄露。解决的方法是把代码改成:
int *p;
p = new int;
delete p;
就可以解决内存泄露的问题了。(及时释放)