dz̸C/C++ÄÚ´æй©¼°Æä¼ì²â¹¤¾ß
¶ÔÓÚÒ»¸öc/c++³ÌÐòÔ±À´Ëµ£¬ÄÚ´æй©ÊÇÒ»¸ö³£¼ûµÄÒ²ÊÇÁîÈËÍ·ÌÛµÄÎÊÌâ¡£ÒѾÓÐÐí¶à¼¼Êõ±»Ñо¿³öÀ´ÒÔÓ¦¶ÔÕâ¸öÎÊÌ⣬±ÈÈçSmart Pointer£¬Garbage CollectionµÈ¡£Smart Pointer¼¼Êõ±È½Ï³ÉÊ죬STLÖÐÒѾ°üº¬Ö§³ÖSmart PointerµÄclass£¬µ«ÊÇËüµÄʹÓÃËƺõ²¢²»¹ã·º£¬¶øÇÒËüÒ²²»Äܽâ¾öËùÓеÄÎÊÌ⣻Garbage Collection¼¼ÊõÔÚJavaÖÐÒѾ±È½Ï³ÉÊ죬µ«ÊÇÔÚc/c++ÁìÓòµÄ·¢Õ¹²¢²»Ë³³©£¬ËäÈ»ºÜÔç¾ÍÓÐÈË˼¿¼ÔÚC++ÖÐÒ²¼ÓÈëGCµÄÖ§³Ö¡£ÏÖʵÊÀ½ç¾ÍÊÇÕâÑùµÄ£¬×÷Ϊһ¸öc/c++³ÌÐòÔ±£¬ÄÚ´æй©ÊÇÄãÐÄÖÐÓÀÔ¶µÄÍ´¡£²»¹ýºÃÔÚÏÖÔÚÓÐÐí¶à¹¤¾ßÄܹ»°ïÖúÎÒÃÇÑéÖ¤ÄÚ´æй©µÄ´æÔÚ£¬ÕÒ³ö·¢ÉúÎÊÌâµÄ´úÂë¡£
¡¡¡¡ÄÚ´æй©µÄ¶¨Òå
¡¡¡¡Ò»°ãÎÒÃdz£ËµµÄÄÚ´æй©ÊÇÖ¸¶ÑÄÚ´æµÄй©¡£¶ÑÄÚ´æÊÇÖ¸³ÌÐò´Ó¶ÑÖзÖÅäµÄ£¬´óСÈÎÒâµÄ£¨ÄÚ´æ¿éµÄ´óС¿ÉÒÔÔÚ³ÌÐòÔËÐÐÆÚ¾ö¶¨£©£¬Ê¹ÓÃÍêºó±ØÐëÏÔʾÊͷŵÄÄÚ´æ¡£Ó¦ÓóÌÐòÒ»°ãʹÓÃmalloc£¬realloc£¬newµÈº¯Êý´Ó¶ÑÖзÖÅäµ½Ò»¿éÄڴ棬ʹÓÃÍêºó£¬³ÌÐò±ØÐ븺ÔðÏàÓ¦µÄµ÷ÓÃfree»òdeleteÊͷŸÃÄÚ´æ¿é£¬·ñÔò£¬Õâ¿éÄÚ´æ¾Í²»Äܱ»ÔÙ´ÎʹÓã¬ÎÒÃǾÍ˵Õâ¿éÄÚ´æй©ÁË¡£ÒÔÏÂÕâ¶ÎС³ÌÐòÑÝʾÁ˶ÑÄÚ´æ·¢Éúй©µÄÇéÐΣº
void MyFunction(int nSize)
{
¡¡char* p= new char[nSize];
¡¡if( !GetStringfrom( p, nSize ) ){
¡¡¡¡MessageBox(“Error”);
¡¡¡¡return;
¡¡}
¡¡…//using the string pointed by p;
¡¡delete p;
}
¡¡¡¡ÀýÒ»
¡¡¡¡µ±º¯ÊýGetStringfrom()·µ»ØÁãµÄʱºò£¬Ö¸ÕëpÖ¸ÏòµÄÄÚ´æ¾Í²»»á±»ÊÍ·Å¡£ÕâÊÇÒ»ÖÖ³£¼ûµÄ·¢ÉúÄÚ´æй©µÄÇéÐΡ£³ÌÐòÔÚÈë¿Ú´¦·ÖÅäÄڴ棬ÔÚ³ö¿Ú´¦ÊÍ·ÅÄڴ棬µ«ÊÇcº¯Êý¿ÉÒÔÔÚÈκεط½Í˳ö£¬ËùÒÔÒ»µ©ÓÐij¸ö³ö¿Ú´¦Ã»ÓÐÊÍ·ÅÓ¦¸ÃÊͷŵÄÄڴ棬¾Í»á·¢ÉúÄÚ´æй©¡£
¡¡¡¡¹ãÒåµÄ˵£¬ÄÚ´æй©²»½ö½ö°üº¬¶ÑÄÚ´æµÄй©£¬»¹°üº¬ÏµÍ³×ÊÔ´µÄй©(resource leak)£¬±ÈÈçºËÐÄ̬HANDLE£¬GDI Object£¬SOCKET£¬ InterfaceµÈ£¬´Ó¸ù±¾ÉÏ˵ÕâЩÓɲÙ×÷ϵͳ·ÖÅäµÄ¶ÔÏóÒ²ÏûºÄÄڴ棬Èç¹ûÕâЩ¶ÔÏó·¢Éúй©×îÖÕÒ²»áµ¼ÖÂÄÚ´æµÄй©¡£¶øÇÒ£¬Ä³Ð©¶ÔÏóÏûºÄµÄÊǺËÐÄ̬Äڴ棬ÕâЩ¶ÔÏóÑÏÖØй©ʱ»áµ¼ÖÂÕû¸ö²Ù×÷ϵͳ²»Îȶ¨¡£ËùÒÔÏà±È֮ϣ¬ÏµÍ³×ÊÔ´µÄй©±È¶ÑÄÚ´æµÄй©¸üΪÑÏÖØ¡£
¡¡¡¡GDI ObjectµÄй©ÊÇÒ»ÖÖ³£¼ûµÄ×ÊԴй©£º
void CMyView::OnPaint( CDC* pDC )
{
¡¡CBitmap bmp;
¡¡CBitmap* pOldBmp;
¡¡bmp.LoadBitmap(IDB_MYBMP);
¡¡pOldBmp = pDC->SelectObject( &bmp );
¡¡…
¡¡if( Something() ){
¡¡¡¡return;
¡¡}
¡¡pDC->SelectObjec
Ïà¹ØÎĵµ£º
µÚ4Õ ÔõÑù²ÅÄܱ£Ö¤²âÊÔЧ¹û£¿
4.1 ºâÁ¿²âÊÔЧ¹ûµÄ»ù±¾Ö¸±ê£º°×ºÐ¸²¸Ç
ºâÁ¿²âÊÔЧ¹ûµÄ»ù±¾Ö¸±êÊǰ׺и²¸ÇÂÊ£¬¼´Í³¼Æ²âÊÔ¶Ô´úÂëÂß¼µ¥Î»µÄ¸²¸Ç×´¿ö¡£´úÂëµÄÂß¼µ¥Î»Ö÷ÒªÓУºÓï¾ä(¿é)£¬Ìõ¼þ¡¢Åж¨¡¢·ÖÖ§¡¢Â·¾¶¡£³£Óõİ׺и²¸ÇÓÐÁùÖÖ£ºÓï¾ä¸²¸Ç¡¢Ìõ¼þ¸²¸Ç¡¢·ÖÖ§¸²¸Ç¡¢Åж¨Ìõ¼þ¸²¸Ç¡¢ÐÞÕýÅж¨Ìõ¼þ¸²¸Ç¡¢º ......
// SnakeMatrix.cpp : Defines the entry point for the console application.
// Create by Xianyi.Ye, May 4,2010
#include "stdafx.h"
#include <iostream.h>
/*
Question: Print a Sanke Matrix as following
i\j 1 2 3 4 5 6
1 1 2 9 10 25 26
2 4 3 8 11 24 27
3 5 6 7 12 23 28
4 16 15 14 ......
µ¥Ïß³Ì
Single-Threaded(static) libc.lib
Debug Single-Threaded(static) & ......
Ñ¡Á½¸ö±È½ÏÓдú±íÐԵĺ¯Êý
Ê×ÏÈÏÂÔØ°²×°sdk£¬½«ÆäÖеÄsde.dll,pe.dllºÍsg.dll¿½±´¹ýÀ´
ʹÓÃÈçϵĴúÂ룬ָ¶¨dllºóÖ±½Óµ÷ÓÃÆäÖеĺ¯Êý£¬
/// <summary>
/// Sets the value for a small integer column.
/// </summary>
[DllImport(".\\sde91.dll", SetLastError = true, ......