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异常处理简介

我什么都布吉岛发布时间：2021-08-15 18:25:00 ，浏览量：4

一个程序的功能是有限的，那些超出函数正常功能范围的行为称为异常，最常见的异常包括数据库连接断开、遇到意外输入。异常实际是系统中最难设计的一部分。

一、throw表达式

程序异常检测部分使用throw表达式引发一个异常。throw后的表达式类型就是异常类型，来看一个最简单的类型：

void printAge(int age)
{
  if(age


    
        
            
                
                
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[8] Undefined variable: user /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 37 行.
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0.4745s