C ++运行时，显示异常消息 [英] C++ runtime, display exception message

问题描述

我在Linux上使用gcc来编译C ++代码。
有些异常不应该处理，应该关闭程序。
但是，我希望能够显示异常字符串：

I am using gcc on linux to compile C++ code. There are some exceptions which should not be handled and should close program. However, I would like to be able to display exception string:

例如：

抛出std :: runtime_error（ message）; 不显示消息，仅显示错误类型。
我也想显示消息。
有办法吗？

throw std::runtime_error(" message"); does not display message, only type of error. I would like to display messages as well. Is there way to do it?

这是一个库，我真的不想放入catch语句让库用户决定。
但是，现在的库用户是fortran，它不允许处理异常。
原则上，我可以将处理程序放入包装器代码中，但是如果没有解决办法，则不要这样做

it is a library, I really do not want to put catch statements and let library user decide. However, right now library user is fortran, which does not allow to handle exceptions. in principle, I can put handlers in wrapper code, but rather not to if there is a way around

推荐答案

标准异常具有虚拟的 what（）方法，该方法为您提供与异常相关的消息：

Standard exceptions have a virtual what() method that gives you the message associated with the exception:

int main() {
   try {
       // your stuff
   }
   catch( const std::exception & ex ) {
       cerr << ex.what() << endl;
   }
}

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