yifu

#include <iostream>

#include <stdio.h>      /* for printf() and fprintf() */
#include <sys/socket.h> /* for socket(), bind(), and connect() */
#include <arpa/inet.h>  /* for sockaddr_in and inet_ntoa() */
#include <stdlib.h>     /* for atoi() and exit() */
#include <string.h>     /* for memset() */
#include <unistd.h>     /* for close() */

#define MAXPENDING 5    /* Maximum outstanding connection requests */

yifu

#include <iostream>

#include <errno.h>
#include <fcntl.h>
#include <stdio.h>      /* for printf() and fprintf() */
#include <sys/socket.h> /* for socket(), connect(), send(), and recv() */
#include <arpa/inet.h>  /* for sockaddr_in and inet_addr() */
#include <stdlib.h>     /* for atoi() and exit() */
#include <string.h>     /* for memset() */
#include <unistd.h>     /* for close() */

yifu

#include <iostream>
#include <iomanip>

int main()
{
  const unsigned long long x = 0xFFFFFFFFFFFFFFFFFFFFFF;
  std::cout << std::hex << x << std::endl;
}

yifu

#include <iostream>
#include <iomanip>
#include <sstream>
#include <iterator>

int main()
{
  const char c = 'E';
  std::ostringstream os;
  os << std::hex << static_cast<int>(c);

yifu

#include <iostream>
#include <time.h>
#include <unistd.h>

int main()
{
  std::cout << "hello" << std::endl;
  //  sleep(5);
  clock_t start;
  start = clock();

yifu

#include <iostream>
#include <time.h>
#include <unistd.h>
#include <pthread.h>
#include <sched.h>
#include <errno.h>

int main()
{
  std::cout << "hello" << std::endl;

yifu

#include <vector>
#include <iostream>

template <int VAL>
struct another_template_type
{
  int dummy;
  another_template_type(const int i = 0) : m_i(i) {}

  int m_i;

yifu

#include <vector>
#include <iostream>

template <int VAL>
struct another_template_type
{
  int dummy;
  another_template_type(const int i = 0) : m_i(i) {}

  int m_i;

yifu

#include <iostream>
#include <string>

using namespace std;

int main()
{
  wstring result = L"hello";
  cout << "hello world." << endl;
  

yifu

#include <iostream>
#include <iterator>
#include <vector>

int main()
{
  std::vector<int> vec;
  vec.push_back(1);
  vec.push_back(2);
  vec.push_back(3);