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#include <stdio.h>
int add(int a,int b)
{
int c=0;
c=a+b;
return c;
}
int main(void)
{
int x=0;
int y=3;
int z=4;
x=add(y,z);
return 0;
}
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addº¯Êý
{
0040D750 push ebp
//°Ñmainº¯ÊýµÄebpѹջ£¬ebp=1000,esp=896
0040D751 mov ebp,esp
//µÃµ½“Дջ»ùÖ·£¬ÕâÀïµÄеÄÒâ˼ÊÇÿ¸öº¯Êý·ÃÎÊÊôÓÚ×Ô¼ºµÄÒ»¿éÕ»ÇøÓò£¬ÆäʵÊÇÏàÁÚµÄÄÚ´æÇøÓò£¬»òÕß˵ջֻÓÐÒ»¸ö¡£ebp=896£¬esp=896
0040D753 sub esp,44h
//ebp=896£¬esp=828
0040D756 push ebx
0040D757 push esi
0040D758 push edi
//ebp=896£¬esp=816
0040D759 lea edi,[ebp-44h]
0040D75C mov ecx,11h
0040D761 mov eax,0CCCCCCCCh
0040D766 rep stos dword ptr [edi]
//³õʼ»¯ÄÚ²¿±äÁ¿Çø
5: int c=0;
0040D768 mov dword ptr [ebp-4],0
//c·ÅÈë“Дջ»ùÖ·
6: c=a+b;
0040D76F mov eax,dword ptr [ebp+8]
0040D772 add &n
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¿´µ½Õâ¸öÃæÊÔÌâ,¹À¼ÆºÜ¶à¸ÕѧCÖ¸ÕëµÄͬѧ¶¼»á¸ã´í.
void GetMemory(char *p)
{
// ´«µÝ½øÀ´µÄµÄֵʹµÃ*p==NULL
// ÕâÀïÐ޸ĵÄÊÇÕâ¸öº¯ÊýÄÚµÄÁÙʱָÕë±äÁ¿pµÄÖµ
p = (char *)malloc(100);
}
void Test(void)
{
char *str = NULL;
// ´«µÝ½øÈ¥µÄÊÇstrµÄÖµNULL
GetMemory(str);
// ÕâÀïstrÖ¸Õë² ......
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#include "reg52.h"
unsigned char Count;
sbit Xiang=P1^2 ; //·äÃùÆ÷Ïì
unsigned char code SONG[] ={
0x26,0x20,0x20,0x20,0x20,0x20,0x26,0x10,0x20,0x10,0x20,0x80,0x26,0x20,0x30,0x20,
0x30,0x20,0x39,0x10,0x30,0x10,0x30,0x80,0x2 ......
¡¡¡¡1£¬mallocÓëfreeÊÇC++/CÓïÑԵıê×¼¿âº¯Êý£¬new/deleteÊÇC++µÄÔËËã·û¡£ËüÃǶ¼¿ÉÓÃÓÚÉêÇ붯̬ÄÚ´æºÍÊÍ·ÅÄÚ´æ¡£
¡¡¡¡2£¬¶ÔÓÚ·ÇÄÚ²¿Êý¾ÝÀàÐ͵ĶÔÏó¶øÑÔ£¬¹âÓÃmaloc/freeÎÞ·¨Âú×㶯̬¶ÔÏóµÄÒªÇó¡£¶ÔÏóÔÚ´´½¨µÄͬʱҪ×Ô¶¯Ö´Ðй¹Ô캯Êý£¬¶ÔÏóÔÚÏûÍö֮ǰҪ×Ô¶¯Ö´ÐÐÎö¹¹º¯Êý¡£ÓÉÓÚmalloc/freeÊǿ⺯Êý¶ø²»ÊÇÔËËã·û£¬²»ÔÚ±àÒëÆ ......
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#include <iostream>
using namespace std;
void Out(int* p)
{
int j = 11;
p = &j;
*p = 12;
cout<<*p<<endl;
}
int main(int argc,char*argv[])
{
&n ......