#鸿蒙通关秘籍#我想问下，适配过程中，如何确保适配后的应用安全？

// before
function div(a: number, b: number): number {
  if (a <= 0 || b <= 0) {
    throw new Error('Invalid numbers.')
  }
  return a / b
}

function sum(num: number): number {
  let sum = 0
  try {
    for (let t = 1; t < 100; t++) {
      sum += div(t, num)
    }
  } catch (e) {
    console.log(e.message)
  }
  return sum
}
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// after
function div(a: number, b: number): number {
  if (a <= 0 || b <= 0) {
    return NaN
  }
  return a / b
}

function sum(num: number): number {
  let sum = 0
  for (let t = 1; t < 100; t++) {
    if (t <= 0 || num <= 0) {
      console.log('Invalid numbers.')
    }
    sum += div(t, num)
  }
  return sum
}
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