为什么阶乘求和的结果错误

Question

到10！结果是对的，但是改成20！结果就不对了？求解答，谢谢彦祖们

Answer 1

你按一下 ctrl + shift + a 整理一下代码先
输出是%lld而不是%d
https://zhidao.baidu.com/question/94687190.html#:~:text=2%E3%80%81long%20long%20%E7%B1%BB%E5%9E%8B%E8%BE%93%E5%87%BA%E7%9A%84%E6%97%B6%E5%80%99%EF%BC%8C%E9%9C%80%E8%A6%81%E7%94%A8printf%E5%87%BD%E6%95%B0%EF%BC%8C%E7%94%A8%25lld%E6%A0%BC%E5%BC%8F%E8%BE%93%E5%87%BA%E3%80%82%20%E7%A4%BA%E4%BE%8B%E4%BB%A3%E7%A0%81%E5%A6%82%E4%B8%8B%EF%BC%9Along%20long,a%20%3D%201234%3Bprintf%20%28%22a%3D%25lldn%22%2C%20a%29%E3%80%82%203%E3%80%81%E8%BE%93%E5%87%BA%E7%9A%84%E5%90%84%E7%A7%8D%E5%8F%AF%E7%94%A8%E4%BA%8E%25d%E4%B8%8A%E7%9A%84%E6%A0%BC%E5%BC%8F%E6%8E%A7%E5%88%B6%EF%BC%8C%E5%9D%87%E5%8F%AF%E7%94%A8%E4%BA%8E%25lld%E4%B8%8A%EF%BC%8C%E6%AF%94%E5%A6%82%2510lld%2C%E8%A1%A8%E7%A4%BA%E8%BE%93%E5%87%BA%E5%8D%A0%E5%8D%81%E4%BD%8D%E5%AE%BD%E5%BA%A6%E7%AD%89%E3%80%82