Exception transfer in C ++ Builder

Taking http get as an example, you need to go to the server to get the webpage content. To prevent errors, retry three times and throw an exception when the last retry fails. We will ignore the previous two exceptions. In C #, it is usually processed as follows: For (INT I = 0; I <3; I ++) {try {...} catch (exception e) {if (I = 2) Throw e ;}} C ++ builder has not been used for several years. CodeWhen I moved to C ++ builder, it was initially like this: for (INT I = 0; I <3; I ++) {try {...} catch (texception & E) {if (I = 2) Throw & E ;}} then calls the upper-layer function to capture exceptions and print them to logs. The result is always a problem when printing logs, ProgramUnable to continue running. Then I suddenly thought of a low-level error: Throw new texception (e) should be used instead of throw & E; E is a stack variable in C ++ builder, in C #, E is a heap variable. Therefore, e can be directly transferred in C #, and a new one is required in C ++ builder to throw the original E as the constructor.