c++ to fortran

Help me , ho can covert this code to fortran :

#include <stdio.h>
#include <tchar.h>
#include <windows.h>
#include <omp.h>

//---------------------------------------------------------
#ifdef __cplusplus
extern "C" {
#endif				/* __cplusplus */
 extern void UseTiming1();
#ifdef __cplusplus
}                               /* extern "C" */
#endif				/* __cplusplus */
struct Thread_time {
	double* Thread;
};
class Timing {
public:
  Timing();
  ~Timing();
  void StartTiming();
  void StopTiming();
  Thread_time GetUserSeconds() const {
	  for (int i = 0; i < nthreads; i++){
	  time.Thread[i]=double(m_userTime[i])/ 10000000.0;
	  }
	  //delete[] m_userTime;
    return (time);
  }
private:
  __int64* GetUserTime() const;
  __int64* m_userTime;
  Thread_time time;
  int nthreads;
};

Timing::Timing(){
	#pragma omp parallel
	{
	nthreads=omp_get_num_threads();
	}
	printf("numbzer thread = %d\n",nthreads);
	m_userTime=new __int64[nthreads];
	time.Thread=new double[nthreads];



}
Timing::~Timing(){
	delete[] m_userTime;
	delete[] time.Thread;
}
__int64* Timing::GetUserTime() const {
  FILETIME creationTime;
  FILETIME exitTime;
  FILETIME kernelTime;
  FILETIME userTime;
  __int64 *CurTime;
  CurTime=new __int64[nthreads];
  #pragma omp parallel for  private(creationTime,exitTime,kernelTime,userTime)
  for (int i = 0; i < nthreads; i++){
  GetThreadTimes(GetCurrentThread(),&creationTime, &exitTime,&kernelTime, &userTime);
  CurTime[i] = userTime.dwHighDateTime;
  CurTime[i] <<= 32;
  CurTime[i] += userTime.dwLowDateTime;
  }
  return CurTime;
}

void Timing::StartTiming() {
  m_userTime = GetUserTime();
}

void Timing::StopTiming() {
	//for (int i = 0; i < Number_Thread; i++)
	__int64 *curUserTime;
     curUserTime = GetUserTime();
  for (int i = 0; i < nthreads; i++){
  m_userTime[i] = curUserTime[i] - m_userTime[i];
  }
}
//---------------------------------------------------------

void Calc()
{
  unsigned sum = 0;

 // #pragma omp parallel for reduction(+:sum) num_threads(2)
  for (int i = 0; i < 1000000; i++)
  {
    char str[1000];
    for (int j = 0; j < 999; j++)
      str[j] = char(((i + j) % 254) + 1);
    str[999] = 0;
    for (char c = 'a'; c <= 'z'; c++)
      if (strchr(str, c) != NULL)
        sum += 1;
  }

  printf("sum = %u\n", sum);
}

void UseTiming1()
{
  Timing t;
  t.StartTiming();

  Calc();

  t.StopTiming();
  for (int i = 0; i < 2; i++)
  printf("Thread %d Timing: %.3G seconds.\n", i,t.GetUserSeconds().Thread[i]);
}