the dice-rolling program without arrays

int roll2, roll3, roll4, roll5, roll6, roll7, roll8, roll9,
  roll10, roll11, roll12;

 sum = d1 + d2; /* sum two die rolls */

 if(sum == 2)
  roll2 = roll2 + 1;
 else (sum == 3)
  roll3 = roll3 + 1;
 else (sum == 4)
  roll4 = roll4 + 1;
 else (sum == 5)
  roll5 = roll5 + 1;
 ...