thongntit

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <inttypes.h>
#include <sys/socket.h>
#include <netinet/ip.h>
#include <netinet/ip_icmp.h>
#include <arpa/inet.h>

thongntit

/* For Windows */
__declspec(align(32)) struct s
{
    char a;
    int b;
};

/* For Unix-like */
alignas(32) struct s1
{

thongntit

#include <stdio.h>
#include <netdb.h>
#include <arpa/inet.h>

int main(int argc, char *argv[])
{
    struct hostent *lh = gethostbyname(argv[1]);

    if (lh){
        printf("%s",inet_ntoa(*( struct in_addr*)lh->h_addr_list[0]));

thongntit

//gcc 5.4.0

#include  <stdio.h>
#include <string.h>
int main(void)
{
    char str[50]="Hello, world!\n";
    char *ptr;
    ptr = strtok(str,",");
    printf("%s",ptr);

thongntit

//gcc 5.4.0

#include  <stdio.h>

int main(void)
{
    char str[100] = "MemFree:       3226700 kB";
    char s1[50];
    char s2[50];
    sscanf(str,"%s%*[ ]%s",s1,s2);