awkについて語るスレ $2

# awk -f add.awk
BEGIN {
  s1 = "323524855"
  s2 = "4972560"

  reverse(a2, s2)
  size = reverse(a1, s1) # s1 > s2
  carry = 0

  for(k = 1; k <= size; k++) { # s1 > s2
    d = a1[k] + a2[k] + carry
    if(d >= 10) {
      e[k] = d - 10
      carry = 1
    } else {
      e[k] = d
      carry = 0
    }
  }

  if(carry == 1) {
    e[k] = 1
    size = k
  }

  g = produce_string(e, size)
  printf("%s + %s = %s\n", s1, s2, g)
  printf("%f\n", s1 + s2)
  exit
}