beijing university of posts telecommunications

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Unformatted text preview: or"; } }; void f() { try { g(); } catch(Matherr m){/*...*/ } } 即使g()抛出的实际上是一 个Int_overflow,这里m 仍然一个Matherr对象,也 即:Int_overflow所携带 的附加信息将是不可访问的 class Int_overflow:public Matherr{ const char* op; int a1, a2; public: Int_overflow(const char* p,int a,int b){ op = p; a1 = a; a2 = b; } 若需要访问附加信息, virtual void debug_print() const { catch后面括号中应该声明 cerr << op << a1 << a2; } 为Matherr的引用或者指针 }; Beijing University of Posts & Telecommunications Beijing young@buptnet.edu.cn 14.2.2 多个异常的组合 并不是每组异常都具有树形结构,也常有一 个异常同属于两个组的情况,如下,这样的 一个Netfile_err异常能够被处理网络的异 常捕获,也能被处理文件系统异常的函数捕 获 对于错误处理的这种非层次性结构的组织形 式很重要,否则用户或许根本意识不到自己 捕获了某个异常 class Netfile_err...
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This note was uploaded on 02/10/2014 for the course ECE C++ taught by Professor Xiaoshengtang during the Fall '13 term at BUPT.

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