WinApi学习笔记-内存的复制，填充，输出等操作

更新时间：2022-08-28 20:26:18

Code
#include <windows.h>
#include <stdio.h>
#include <iostream>

using namespace std;
#define MEM_BLOCK_SIZE 32

//lpMem需要打印的内存指针
//dwSize大小
BOOL ShowMemContent(LPVOID lpMem,SIZE_T dwSize)
{
    BYTE lpShow[MEM_BLOCK_SIZE];
    INT i = 0;
    if(dwSize >MEM_BLOCK_SIZE)
    {
        cout<<"over flow堆栈溢出";
        return FALSE;
    }
    CopyMemory((LPVOID)lpShow,lpMem,dwSize);
    for(;i<dwSize;i++)
    {
        //cout<<&lpShow[i];
        printf("%.2X",lpShow[i]);
        if(!((i+1)%16))
        {
            cout<<endl;
        }
    }
    cout<<endl;
    return TRUE;
}
int main(void)
{
    HANDLE hHeap = GetProcessHeap();
    LPVOID lpSrc;
    LPVOID lpDis;
    lpSrc = HeapAlloc(hHeap,0,MEM_BLOCK_SIZE);
    lpDis = HeapAlloc(hHeap,0,MEM_BLOCK_SIZE);
    cout<<"HeapAlloc分配但不清零"<<endl;
    ShowMemContent(lpDis,MEM_BLOCK_SIZE);
    ZeroMemory(lpDis,MEM_BLOCK_SIZE);

    cout<<"HeapAlloc分配并清零"<<endl;
    ShowMemContent(lpDis,MEM_BLOCK_SIZE);

    cout<<"用指定的内容填充内存"<<endl;
    FillMemory(lpSrc,MEM_BLOCK_SIZE,0xBB);
    FillMemory(lpSrc,MEM_BLOCK_SIZE/2,0xAA);
    CopyMemory(lpDis,lpSrc,MEM_BLOCK_SIZE);
    ShowMemContent(lpDis,MEM_BLOCK_SIZE);

    HeapFree(hHeap,0,lpSrc);
    HeapFree(hHeap,0,lpDis);

    CHAR a;
    std::cin>>a;

}

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WinApi学习笔记-内存的复制，填充，输出等操作

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