exception-handling

问题 I am having a little bit of a problem here. I am trying to figure out how to catch the IllegalArgumentException. For my program, if the user enters a negative integer, the program should catch the IllegalArgumentException and ask the user if he/she wants to try again. But when the exception is thrown, it doesn't give that option. It just terminates. I tried to use the try and catch method but it doesn't work for me. How do I catch this particular exception to continue to run instead of

问题 I am having a little bit of a problem here. I am trying to figure out how to catch the IllegalArgumentException. For my program, if the user enters a negative integer, the program should catch the IllegalArgumentException and ask the user if he/she wants to try again. But when the exception is thrown, it doesn't give that option. It just terminates. I tried to use the try and catch method but it doesn't work for me. How do I catch this particular exception to continue to run instead of

问题 I am having a little bit of a problem here. I am trying to figure out how to catch the IllegalArgumentException. For my program, if the user enters a negative integer, the program should catch the IllegalArgumentException and ask the user if he/she wants to try again. But when the exception is thrown, it doesn't give that option. It just terminates. I tried to use the try and catch method but it doesn't work for me. How do I catch this particular exception to continue to run instead of

问题 Problem Several tasks are run in parallel, and all, none, or any of them might throw exceptions. When all the tasks have finalized, all the exceptions that might have happened must be reported (via log, email, console output.... whatever). Expected behavior I can build all the tasks via linq with async lambdas, and then await for them running in parallel with Task.WhenAll(tasks) . Then I can catch an AggregateException and report each of the individual inner exceptions. Actual behavior An

问题 Problem Several tasks are run in parallel, and all, none, or any of them might throw exceptions. When all the tasks have finalized, all the exceptions that might have happened must be reported (via log, email, console output.... whatever). Expected behavior I can build all the tasks via linq with async lambdas, and then await for them running in parallel with Task.WhenAll(tasks) . Then I can catch an AggregateException and report each of the individual inner exceptions. Actual behavior An

问题 I query user input which is expected to be an int by using int(raw_input(...)) However when the user doesn't enter an integer, i.e. just hits return, I get a ValueError. def inputValue(inputMatrix, rangeRows, rangeCols, defaultValue, playerValue): rowPos = int(raw_input("Please enter the row, 0 indexed.")) colPos = int(raw_input("Please enter the column, 0 indexed.")) while True: #Test if valid row col position and position does not have default value if rangeRows.count(rowPos) == 1 and

问题 I query user input which is expected to be an int by using int(raw_input(...)) However when the user doesn't enter an integer, i.e. just hits return, I get a ValueError. def inputValue(inputMatrix, rangeRows, rangeCols, defaultValue, playerValue): rowPos = int(raw_input("Please enter the row, 0 indexed.")) colPos = int(raw_input("Please enter the column, 0 indexed.")) while True: #Test if valid row col position and position does not have default value if rangeRows.count(rowPos) == 1 and

问题 I query user input which is expected to be an int by using int(raw_input(...)) However when the user doesn't enter an integer, i.e. just hits return, I get a ValueError. def inputValue(inputMatrix, rangeRows, rangeCols, defaultValue, playerValue): rowPos = int(raw_input("Please enter the row, 0 indexed.")) colPos = int(raw_input("Please enter the column, 0 indexed.")) while True: #Test if valid row col position and position does not have default value if rangeRows.count(rowPos) == 1 and

问题 So I have this chunk of code, and when debugging in Visual Studio, it's breaking even though the exception is handled in my code. I only want it to break when this exception is unhandled by my code. The Exceptions Settings box only has an option to continue on unhandled exceptions in user code, but that's not acceptable because I still need it to break if it's unhandled. I've seen screenshots of previous versions of VS that had an option for this. Is this a VS 2015 bug or did microsoft remove

问题 One of the ancient anti-pattern is people checking error status and then returning fairly useless messages like "operation failed" instead of "operation failed because ...". I want C++ file I/O operations to fail with exception and get the error message on why it failed. Specifically I want ofstream object to raise exception when file creation fails and get bit more useful message such as "permission denied" or "No file or path". This is trivial to do in languages such as C# or Java or Python