#include <stdio.h>
void main()
{
  int i;
  i = 1;
  printf("number = %d\n",i);     // 1
  printf("number = %d\n",i+1);   // 2
  printf("number = %d\n",i+1);   // 2
  printf("number = %d\n",i);     // 1
  printf("number = %d\n",i++);   // 1
  printf("number = %d\n",i++);   // 2
  printf("number = %d\n",i);     // 3
  printf("number = %d\n",++i);   // 4
  printf("number = %d\n",++i);   // 5
  printf("number = %d\n",i);     // 5
  printf("number = %d\n",i+=2);  // 7
  printf("number = %d\n",i+=2);  // 9
  printf("%d\n",i);              // 9
  i++;
  printf("%d\n",i);              // 10
  ++i;
  printf("%d\n",i);              // 11
  printf("%d\n",i++);            // 11
  printf("%d\n",i);              // 12
  printf("%d\n",++i);            // 13
  printf("%d\n",i);              // 13
  getchar();
}