int main (void)
{
  int a=1, b=2, c;
  a++, b++, c=a+b;
  printf("a) a=%d, b=%d, c=%d\n", a, b, c);
  a=1, b=2;
  c= a+ ++b;
  printf("b) a=%d, b=%d, c=%d\n", a, b, c);
  a=1, b=2;
  c= a++ +b;
  printf("c) a=%d, b=%d, c=%d\n", a, b, c);
  a=1, b=2;
  c= a+++b;
  printf("d) a=%d, b=%d, c=%d\n", a, b, c);
  a=1, b=2;
  c= a++ + ++b;
  printf("e) a=%d, b=%d, c=%d\n", a, b, c);
/*
  a=1, b=2;
  the next line gives an error - invalid lvalue in increment
  c= a+++++b;
  printf("f) a=%d, b=%d, c=%d\n", a, b, c);
*/
  return 0;
}