Windows下用C语言获取系统的CPU利用率内存使用率硬盘使用率等

Posted 2022-08-18 DaveBobo

最近在做一个网管软件用C语言获取的系统的一些参数，其中包括系统时间，系统运行时间，系统版本，CPU利用率，内存使用率，硬盘使用率，CPU风扇转速等参数，整理代码如下：

#include <stdio.h>
#include <Windows.h>
#include<time.h>
#include <tchar.h>

#define DIV 1024
#define WIDTH 7
#define GB(x) (((x).HighPart << 2) + ((DWORD)(x).LowPart) / 1024.0 / 1024.0 / 1024.0)

#pragma warning(disable: 4996)   

#define true 1
typedef	unsigned char U_CHAR;

//获取系统时间
int getSystemTime(char* buffer)

	char buf[128];
	time_t rawtime;
	struct tm * timeinfo;
	time(&rawtime);
	timeinfo = localtime(&rawtime);
	strftime(buf, sizeof(buf), "Now is %Y-%m-%d %H:%M:%S", timeinfo);
	strcpy(buffer,buf);


//CPU利用率
FILETIME m_preidleTime;
FILETIME m_prekernelTime;
FILETIME m_preuserTime;

__int64 CompareFileTime2(FILETIME time1, FILETIME time2)

	__int64 a = time1.dwHighDateTime << 32 | time1.dwLowDateTime;
	__int64 b = time2.dwHighDateTime << 32 | time2.dwLowDateTime;


	return   b - a;


void GetCpuUseage()

	GetSystemTimes(&m_preidleTime, &m_prekernelTime, &m_preuserTime);
	Sleep(1000);


double CpuUseage()

	FILETIME idleTime;
	FILETIME kernelTime;
	FILETIME userTime;
	GetSystemTimes(&idleTime, &kernelTime, &userTime);


	int idle = CompareFileTime2(m_preidleTime, idleTime);
	int kernel = CompareFileTime2(m_prekernelTime, kernelTime);
	int user = CompareFileTime2(m_preuserTime, userTime);


	if (kernel + user == 0)
		return 0.0;
	//（总的时间-空闲时间）/总的时间=占用cpu的时间就是使用率
	double cpu = abs((kernel + user - idle) * 100 / (kernel + user));

	m_preidleTime = idleTime;
	m_prekernelTime = kernelTime;
	m_preuserTime = userTime;
	return cpu;


//读取操作系统的名称
void GetSystemName(char* osname)

	char buf[128];
	SYSTEM_INFO info;        //用SYSTEM_INFO结构判断64位AMD处理器 
	GetSystemInfo(&info);    //调用GetSystemInfo函数填充结构 
	OSVERSIONINFOEX os;
	os.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);

	strcpy(buf, "unknown OperatingSystem.");

	if (GetVersionEx((OSVERSIONINFO *)&os))
	
		//下面根据版本信息判断操作系统名称 
		switch (os.dwMajorVersion)//判断主版本号
		
		case 4:
			switch (os.dwMinorVersion)//判断次版本号 
			
			case 0:
				if (os.dwPlatformId == VER_PLATFORM_WIN32_NT)
					strcpy(buf, "Microsoft Windows NT 4.0"); //1996年7月发布 
				else if (os.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS)
					strcpy(buf, "Microsoft Windows 95");
				break;
			case 10:
				strcpy(buf, "Microsoft Windows 98"); 
				break;
			case 90:
				strcpy(buf, "Microsoft Windows Me"); 
				break;
			
			break;

		case 5:
			switch (os.dwMinorVersion)	//再比较dwMinorVersion的值
			
			case 0:
				strcpy(buf, "Microsoft Windows 2000"); //1999年12月发布
				break;

			case 1:
				strcpy(buf, "Microsoft Windows XP"); //2001年8月发布
				break;

			case 2:
				if (os.wProductType == VER_NT_WORKSTATION
					&& info.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64)
				
					strcpy(buf, "Microsoft Windows XP Professional x64 Edition"); 
				
				else if (GetSystemMetrics(SM_SERVERR2) == 0)
					strcpy(buf, "Microsoft Windows Server 2003"); //2003年3月发布 
				else if (GetSystemMetrics(SM_SERVERR2) != 0)
					strcpy(buf, "Microsoft Windows Server 2003 R2"); 
				break;
			
			break;

		case 6:
			switch (os.dwMinorVersion)
			
			case 0:
				if (os.wProductType == VER_NT_WORKSTATION)
					strcpy(buf, "Microsoft Windows Vista"); 
				else
					strcpy(buf, "Microsoft Windows Server 2008"); //服务器版本 
				break;
			case 1:
				if (os.wProductType == VER_NT_WORKSTATION)
					strcpy(buf, "Microsoft Windows 7"); 
				else
					strcpy(buf, "Microsoft Windows Server 2008 R2"); 
				break;
			
			break;
		
	//if(GetVersionEx((OSVERSIONINFO *)&os))

	strcpy(osname, buf);


int main()

	//获取系统时间
	char buffer[128];
	getSystemTime(buffer);
	puts(buffer);

	//系统运行时间
	clock_t start, finish;
	double duration;

	start = clock();
	while (true)
	
		finish = clock();
		duration = (double)(finish - start) / CLOCKS_PER_SEC;
		Sleep(1000);
		printf("%.0f 秒\\n", duration);

	

	//系统版本名称
	char osname[20];
	GetSystemName(osname);
	printf("%s\\n", osname);

	//CPU利用率
	while (true)
	
		U_CHAR  sysStateCpu[5];
		double cpu = CpuUseage();
		sprintf((char*)sysStateCpu, "%.2lf", cpu);
		printf("CPU使用率：%s%%\\n", sysStateCpu);
		Sleep(1000);
	

	//内存使用率
	char bufPreCPU[5];
	MEMORYSTATUSEX statex;
	statex.dwLength = sizeof(statex);
	GlobalMemoryStatusEx(&statex);
	sprintf(bufPreCPU, "%ld%%\\n", statex.dwMemoryLoad);
	puts(bufPreCPU);

	//硬盘使用率 调用windows API
	ULARGE_INTEGER FreeBytesAvailableC, TotalNumberOfBytesC, TotalNumberOfFreeBytesC;
	ULARGE_INTEGER FreeBytesAvailableD, TotalNumberOfBytesD, TotalNumberOfFreeBytesD;
	ULARGE_INTEGER FreeBytesAvailableE, TotalNumberOfBytesE, TotalNumberOfFreeBytesE;
	ULARGE_INTEGER FreeBytesAvailableF, TotalNumberOfBytesF, TotalNumberOfFreeBytesF;
		 
	GetDiskFreeSpaceEx(_T("C:"), &FreeBytesAvailableC, &TotalNumberOfBytesC, &TotalNumberOfFreeBytesC);
	GetDiskFreeSpaceEx(_T("D:"), &FreeBytesAvailableD, &TotalNumberOfBytesD, &TotalNumberOfFreeBytesD);
	GetDiskFreeSpaceEx(_T("E:"), &FreeBytesAvailableE, &TotalNumberOfBytesE, &TotalNumberOfFreeBytesE);
	GetDiskFreeSpaceEx(_T("F:"), &FreeBytesAvailableF, &TotalNumberOfBytesF, &TotalNumberOfFreeBytesF);
	/*参数 类型及说明
	lpRootPathName String，不包括卷名的磁盘根路径名
	lpFreeBytesAvailableToCaller LARGE_INTEGER，指定一个变量，用于容纳调用者可用的字节数量
	lpTotalNumberOfBytes LARGE_INTEGER，指定一个变量，用于容纳磁盘上的总字节数
	lpTotalNumberOfFreeBytes LARGE_INTEGER，指定一个变量，用于容纳磁盘上可用的字节数
	适用平台
	Windows 95 OSR2，Windows NT 4.0*/
	float totalHardDisk = GB(TotalNumberOfBytesC) + GB(TotalNumberOfBytesD) + GB(TotalNumberOfBytesE) + GB(TotalNumberOfBytesF);
	float freeHardDisk = GB(TotalNumberOfFreeBytesC) + GB(TotalNumberOfFreeBytesD) + GB(TotalNumberOfFreeBytesE) + GB(TotalNumberOfFreeBytesF);
	
	float hardDiskUsage = 1- freeHardDisk / totalHardDisk;

	//CPU风扇转速

	printf("hello world!\\n");
	system("pause");