获取ubuntu系统内存大小的小程序

#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <linux/kernel.h>

static int print_memory_size(void)
{
    int errorCode = 0;
    struct sysinfo si;

    errorCode = sysinfo(&si);
    if (errorCode) {
        printf("Failed to get memory type: %d \n", errorCode);
        return -1;
    }

    printf("Total memory : %ld KB\n", (si.totalram / 1024));
    return 0;
}

void main(void)
{
    print_memory_size();
}