C/C++ - 获取Linux系统运行情况信息

#include <stdio.h>
#include <unistd.h>    /* usleep() */
#include <stdlib.h>
#include <iostream>
#include <fstream>

class SystemRuntimeInfo {

public:  
	void GetSysStatInfo()  
	{
		system("top -bn 1 -i -c >> sys.txt");
	}

	void GetCpuInfo()
	{
		system("sar -P ALL -u 1 5 >> cpu.txt");
		// system("");
		// system("mpstat 1 5 >> cpu.txt");
		// system("dstat -c >> cpu.txt");
	}

	void GetDiskInfo()
	{
		system("df -lh >> disk.txt");
	}

	void GetMemoryInfo()
	{
		system("vmstat 1 5 >> memroy.txt");
	}

	void GetIoInfo()
	{
		system("iostat 1 5 >> io.txt");
	}
};

int main()  
{
	unsigned count = 5;
	while (count --> 0) 
	{
		SystemRuntimeInfo aInfo;
		std::ofstream outfile;

		outfile.open("sys.txt", std::ios::app | std::ios::trunc);
		outfile << '\n';
		aInfo.GetSysStatInfo();
		outfile << '\n' << std::endl;
		outfile.close();

		outfile.open("cpu.txt", std::ios::app | std::ios::trunc);
		outfile << '\n';
		aInfo.GetCpuInfo();
		outfile << '\n' << std::endl;
		outfile.close();

		outfile.open("disk.txt", std::ios::app | std::ios::trunc);
		outfile << '\n';
		aInfo.GetDiskInfo();
		outfile << '\n' << std::endl;
		outfile.close();

		outfile.open("memory.txt", std::ios::app | std::ios::trunc);
		outfile << '\n';
		aInfo.GetMemoryInfo();
		outfile << '\n' << std::endl;
		outfile.close();

		usleep(1000);
	}

	return 0;
}
#include <stdio.h>
#include <unis