小弟又问一个非常简单的问题？

[ghw1]

我对C++的语法不是很熟悉。看着MSDN写程序还是问题百出。哪位高人帮我解释一下getsysteminfo的用法好么？最好给段代码，一定给分。

[Jneu]

MSDN上写的很清楚啊！

[Jneu]

up

[prog_st]

Platform SDK: Windows System Information
Getting Hardware Information
The following example uses the GetSystemInfo function to obtain hardware information such as the OEM identifier, processor type, page size, and so on. The example displays the information in a window's client area.

SYSTEM_INFO siSysInfo; // struct. for hardware information
int aTabs[1] = {260}; // tab stop for TabbedTextOut

TCHAR tchBuffer[BUFFER]; // buffer for expanded string
int nSize; // size of string

// Display the "hardware information" header.

nSize = sprintf(tchBuffer,
"Hardware information:");
TextOut(hdc, 15, 20, tchBuffer, nSize);

// Copy the hardware information to the SYSTEM_INFO structure.

GetSystemInfo(&siSysInfo);

// Display the contents of the SYSTEM_INFO structure.

nSize = sprintf(tchBuffer,
"OEM ID: %u\tNumber of Processors: %u",
siSysInfo.dwOemId,
siSysInfo.dwNumberOfProcessors);
TabbedTextOut(hdc, 25, 40, tchBuffer,
nSize, 1, aTabs, 25);

nSize = sprintf(tchBuffer,
"Page size: %u\tProcessor Type: %u",
siSysInfo.dwPageSize,
siSysInfo.dwProcessorType);
TabbedTextOut(hdc, 25, 60, tchBuffer,
nSize, 1, aTabs, 25);

nSize = sprintf(tchBuffer,
"Minimum app address: %lx\tMaximum app address: %lx",
siSysInfo.lpMinimumApplicationAddress,
siSysInfo.lpMaximumApplicationAddress);
TabbedTextOut(hdc, 25, 80, tchBuffer,
nSize, 1, aTabs, 25);

nSize = sprintf(tchBuffer,
"Active processor mask: %u",
siSysInfo.dwActiveProcessorMask);
TextOut(hdc, 25, 100, tchBuffer, nSize);
The following example uses the GetSystemMetrics function to determine whether a mouse is installed and whether the mouse buttons are swapped. The example also uses the SystemParametersInfo function to retrieve the mouse threshold and speed. It displays the information in a message box.

TCHAR tchBuffer[BUFFER]; // buffer for expanded string
int nSize; // size of string

BOOL fResult; // system shutdown flag

int aMouseInfo[3]; // array for mouse information

// Is there a mouse?

fResult = GetSystemMetrics(SM_MOUSEPRESENT);

if (fResult == 0)
{
// Indicate if there is no mouse.

nSize = sprintf(tchBuffer, "No mouse installed.");
}
else
{
// If there is a mouse, determine whether its buttons are swapped.

fResult = GetSystemMetrics(SM_SWAPBUTTON);

if (fResult == 0)
{
nSize = sprintf(tchBuffer, "Buttons not swapped.\r");
}
else
{
nSize = sprintf(tchBuffer, "Buttons swapped.\r");
}

// Get the mouse speed and the threshold values.

SystemParametersInfo(SPI_GETMOUSE, // get mouse information
NULL, // not used
&aMouseInfo, // holds mouse information
NULL); // not used

nSize += sprintf(tchBuffer + nSize,
"Speed: %d\r", aMouseInfo[2]);
sprintf(tchBuffer + nSize,
"Threshold (x,y): %d,%d",
aMouseInfo[0], aMouseInfo[1]);
}

// Display the mouse information.

MessageBox(NULL, tchBuffer, "Mouse information",
MB_ICONINFORMATION);
This next example uses SystemParametersInfo to double the mouse speed and update the MouseSpeed value in the WIN.INI file.

TCHAR tchBuffer[BUFFER]; // buffer for expanded string
int nSize; // size of string

int aMouseInfo[3]; // array for mouse information

// Get the current mouse speed.

SystemParametersInfo(SPI_GETMOUSE, // get mouse information
NULL, // not used
&aMouseInfo, // holds mouse information
NULL); // not used

// Double it.

aMouseInfo[2] = 2 * aMouseInfo[2];

// Change the mouse speed to the new value and update WIN.INI.

SystemParametersInfo(SPI_SETMOUSE, // set mouse information
NULL, // not used
aMouseInfo, // mouse information
SPIF_UPDATEINIFILE); // update win.ini
Platform SDK Release: February 2001 Contact Platform SDK Order a Platform SDK CD Online

[ljyqw]

看看这个：

#using <mscorlib.dll>
using namespace System;
using namespace System::Runtime::InteropServices;

typedef unsigned short WORD;
typedef unsigned long DWORD;
typedef unsigned int UINT;
typedef void *LPVOID;

__nogc struct SYSTEM_INFO {
DWORD dwOemId;
DWORD dwPageSize;
LPVOID lpMinimumApplicationAddress;
LPVOID lpMaximumApplicationAddress;
DWORD dwActiveProcessorMask;
DWORD dwNumberOfProcessors;
DWORD dwProcessorType;
DWORD dwAllocationGranularity;
WORD wProcessorLevel;
WORD wProcessorRevision;
};

[DllImport("kernel32")]
extern "C" void GetSystemInfo(SYSTEM_INFO *pSI);

int main(void) {
SYSTEM_INFO* pSI = new SYSTEM_INFO;
GetSystemInfo(pSI);
Console::Write(L"The number of CPUs: ");
Console::WriteLine((long)pSI->dwNumberOfProcessors);
return 0;
}

[hydnoahark]

你需要#include <Windows.h>
#include "stdafx.h"
#include <Windows.h>
#include <iostream.h>

int main(int argc, char* argv[])
{
SYSTEM_INFO *pSy=new SYSTEM_INFO;
GetSystemInfo(pSy);

cout<<pSy->wProcessorLevel<<endl;
return 0;
}

[skt985]

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