#include <sys/time.h>

typedef struct {
    struct timeval startTime;
    struct timeval endTime;
} Timer;

Timer timer;

void startTime();
void stopTime();
void elapsedTime();

#ifdef DEBUG
	#define ARRAY_SIZE 10
#else
	#define ARRAY_SIZE 1000
#endif
typedef int matrix_t[ARRAY_SIZE][ARRAY_SIZE];

void startTime() {
	printf("Start Timer.\n");
    gettimeofday(&(timer.startTime), NULL);
}

void stopTime() {
    printf("Stop Timer.\n");
    gettimeofday(&(timer.endTime), NULL);
}

void elapsedTime() {
	float elapseTime = (float) ((timer.endTime.tv_sec - timer.startTime.tv_sec) \
                + (timer.endTime.tv_usec - timer.startTime.tv_usec)/1.0e6);
	printf("Elapsed Time: %4.2f Sec.\n",elapseTime);
}

void checkSum(int size, matrix_t MC)
{
  int row, column;
  long sum = 0;
  for (row = 0; row < size; row++) {
    for (column = 0; column < size; column++) {
      sum += MC[row][column];
    }
  }
  	printf("CheckSum Value is: %ld\n", sum);
}