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

来源：互联网发布：centos 硬盘分区规则编辑：程序博客网时间：2024/04/28 09:33
#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");    }
转自：http://blog.csdn.net/davebobo/article/details/51698496
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