U++ forum: Welcome to the forum

how to input an int into std::string? and an exception question [message #13362]

Thu, 03 January 2008 04:10

bonami
Messages: 186
Registered: June 2007
Location: Beijing

Experienced Member

iota is good, but that is for char *.
i used std::stringstream, which accepts int well, but when i convered it into std::string and threw it, my program crashed.

std::stringstream msg;
msg << "failed to bind to " << localSocket->ip() << ":" << localSocket->port()/* this is an int */;
throw std::string(msg.str()); //or simply  throw msg.str();

...
catch (std::string err) ...

& i want standard C++ method, not String or alike.
another question is why my functions cannot throw an exception by default

child() {... throw std::string("error"); }
  dad() {... child(); ...}/*crashes*/
  mum() {... try { child(); }/*this works*/
    catch (std::string err) { throw err; }}
grand() {... try { dad()/* or mum()*/; }
  catch (std::string err) {....}}

today i just ran mum() again, and it crashed, too... (since i had been Debuggin, i could locate the last sentence is throw)

[Updated on: Thu, 17 January 2008 07:05]

Report message to a moderator