C/C++获取Windows系统CPU和内存及硬盘使用情况

//1.获取Windows系统内存使用率

//windows 内存 使用率DWORD getWin_MemUsage(){MEMORYSTATUS ms;::GlobalMemoryStatus(&ms);return ms.dwMemoryLoad;}

//2.获取windowsCPU使用率

__int64 CompareFileTime(FILETIME time1, FILETIME time2){__int64 a = time1.dwHighDateTime << 32 | time1.dwLowDateTime;__int64 b = time2.dwHighDateTime << 32 | time2.dwLowDateTime;return (b - a);}//WIN CPU使用情况void getWin_CpuUsage(){HANDLE hEvent;BOOL res;FILETIME preidleTime;FILETIME prekernelTime;FILETIME preuserTime;FILETIME idleTime;FILETIME kernelTime;FILETIME userTime;res = GetSystemTimes(&idleTime, &kernelTime, &userTime);preidleTime = idleTime;prekernelTime = kernelTime;preuserTime = userTime;hEvent = CreateEventA(NULL, FALSE, FALSE, NULL); // 初始值为 nonsignaled ，并且每次触发后自动设置为nonsignaledwhile (true){WaitForSingleObject(hEvent, 1000);res = GetSystemTimes(&idleTime, &kernelTime, &userTime);__int64 idle = CompareFileTime(preidleTime, idleTime);__int64 kernel = CompareFileTime(prekernelTime, kernelTime);__int64 user = CompareFileTime(preuserTime, userTime);__int64 cpu = (kernel + user - idle) * 100 / (kernel + user);__int64 cpuidle = (idle)* 100 / (kernel + user);cout << "CPU利用率:" << cpu << "%" << " CPU空闲率:" << cpuidle << "%" << endl;preidleTime = idleTime;prekernelTime = kernelTime;preuserTime = userTime;}}

//获取 WIN 硬盘使用情况int getWin_DiskUsage(){int DiskCount = 0;DWORD DiskInfo = GetLogicalDrives();//利用GetLogicalDrives()函数可以获取系统中逻辑驱动器的数量，函数返回的是一个32位无符号整型数据。  while (DiskInfo)//通过循环操作查看每一位数据是否为1，如果为1则磁盘为真,如果为0则磁盘不存在。  {if (DiskInfo & 1)//通过位运算的逻辑与操作，判断是否为1  {++DiskCount;}DiskInfo = DiskInfo >> 1;//通过位运算的右移操作保证每循环一次所检查的位置向右移动一位。  //DiskInfo = DiskInfo/2;  }cout << "Logical Disk Number:" << DiskCount << endl;//-----------------------------------------------------------------------------------------int DSLength = GetLogicalDriveStrings(0, NULL);//通过GetLogicalDriveStrings()函数获取所有驱动器字符串信息长度。  char* DStr = new char[DSLength];//用获取的长度在堆区创建一个c风格的字符串数组  GetLogicalDriveStrings(DSLength, (LPTSTR)DStr);//通过GetLogicalDriveStrings将字符串信息复制到堆区数组中,其中保存了所有驱动器的信息。  int DType;int si = 0;BOOL fResult;unsigned _int64 i64FreeBytesToCaller;unsigned _int64 i64TotalBytes;unsigned _int64 i64FreeBytes;for (int i = 0; i<DSLength / 4; ++i)//为了显示每个驱动器的状态，则通过循环输出实现，由于DStr内部保存的数据是A:\NULLB:\NULLC:\NULL，这样的信息，所以DSLength/4可以获得具体大循环范围  {char dir[3] = { DStr[si], '：', '\\' };cout << dir;DType = GetDriveType(DStr + i * 4);//GetDriveType函数，可以获取驱动器类型，参数为驱动器的根目录  if (DType == DRIVE_FIXED){cout << "Hard Disk";}else if (DType == DRIVE_CDROM){cout << "CD-ROM";}else if (DType == DRIVE_REMOVABLE){cout << "Removable Disk";}else if (DType == DRIVE_REMOTE){cout << "Network Disk";}else if (DType == DRIVE_RAMDISK){cout << "Virtual RAM Disk";}else if (DType == DRIVE_UNKNOWN){cout << "Unknown Device";}fResult = GetDiskFreeSpaceEx(dir,(PULARGE_INTEGER)&i64FreeBytesToCaller,(PULARGE_INTEGER)&i64TotalBytes,(PULARGE_INTEGER)&i64FreeBytes);//GetDiskFreeSpaceEx函数，可以获取驱动器磁盘的空间状态,函数返回的是个BOOL类型数据  if (fResult)//通过返回的BOOL数据判断驱动器是否在工作状态  {cout << " totalspace:" << (float)i64TotalBytes / 1024 / 1024 << " MB";//磁盘总容量  cout << " freespace:" << (float)i64FreeBytesToCaller / 1024 / 1024 << " MB";//磁盘剩余空间  }else{cout << " 设备未准备好";}cout << endl;si += 4;}return 0;}

//main函数

int main( int argc, char **argv ){//+++======================获取windows 内存使用率==================+++//DWORD dwValue = getWin_MemUsage();printf("内存使用率为 %d %% \n",dwValue);//+++======================获取Windows CPU使用率====================+++////getWin_CpuUsage();//+++======================获取Windows 硬盘使用====================+++//getWin_DiskUsage();        return 0;}