希望程序即使有异常也能继续

本文介绍了希望程序即使有异常也能继续的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我搜索了几次，但我还没找到我真正想要的东西。

I have searched a few times but I kinda, didnt found what i exactly wanted.

我在进行特殊处理（尝试/捕获）时，发现了这个障碍。如果程序发现异常，则它将终止。

I was working out with exceptional handling (try/catch), where i found this obstacle. If the program finds an exception, it terminated whatsoever.

我尝试在 catch 部分调用一个函数，但是

I tried calling a function in the catch part, but it still terminates.

void exception_handle() //This is for handling exception if user inputs a char instead of int// { user_play uplay; try { uplay.usersentry(); } catch(std::runtime_error& e) { cout<<"Input a string bro, not a character"<<endl; user_input(); } }

这是课程：

class user_play //this class is for letting user play the game by allowing them to enter desired number in the desired empty space// { public: void usersentry() { int tempdata; retry: cout<<"\n\n Enter the row and coloumn where you want to enter data"<<endl; cin>>i>>j; if (i>=1 && i<=9 && j>=1 && j<=9) { cout<<"\n Enter your desired value to put in that place"<<endl; cin>>tempdata; if(tempdata>=1 && tempdata<=9) { data=tempdata; } else { throw std::runtime_error("Soduku contains numbers from 1 to 9 only.Please try again"); loops++; } } else { throw std::runtime_error("Soduku row exists between 1 and 9 only.Please try again"); loops++; } } };

这里是函数（由于我要调试，所以不完整）

Here is the function(It's incomplete as i am trying to debugg)

int user_input() //this one is for taking correct value from user and storing it in its respective place// { a=0; //Object Declaration// rowrules rr; columnrules cr; //for handling the program exceptions exception_handle(); //rules for row and column //rr.rrules(); //cr.crules(); //ruleselect(); //i--; //j--; if(a==0) { soduku[i-1][j-1]=data; return soduku[i-1][j-1]; } else { user_input(); } }

在这里您看到我尝试在 catch 部分，但程序仍然终止。我缺少基本内容吗？还是有其他解决方案/方法/逻辑？ 谢谢！

here as you see i tried calling the function in catch part but still the program terminated.Am I missing something basic?? Or is there any other solution/method/logic? Thanks!

推荐答案

无法从引发C ++异常的地方继续执行。 C ++异常不是为此而设计的。但是，如果发生异常，则可以重复您要重复的代码：

It is not possible to continue execution from the place where C++ exception is thrown. C++ exceptions are not designed for that. But it is possible to repeat the code you want repeated if the exception happens:

for (bool success = false; !success; ) { try { <some code that should be repeated if exception happens> success = true; } catch (...) { } }

请注意，在一般情况下，如果发生异常，绝对不执行任何操作是个坏主意。如果有的话，至少要在一些日志文件中写下来。

Note that in general case it is a bad idea to do absolutely nothing if exception happens. At least write something down in some log file, if you have it.