sysinfo

gistfile1.txt

#include <stdio.h>
#include <stdlib.h>
#include <iostream>
#include <sys/sysinfo.h>
#include <errno.h>

int main(int argc, char** argv)
{
  struct sysinfo info;
  if (sysinfo(&info) != 0) {
    return errno;
  }

  std::cout << "Total:" << info.totalram * info.mem_unit << std::endl;
  std::cout << "Free:" << info.freeram * info.mem_unit << std::endl;
}