Console Number Exception Handling.

[Ed Dana]

I am attempting to use exception handling in the console to trap an
invalid character into a numeric field. Unfortunately, using this example:
======================================================================
#include <exception>

#include <iostream>
using namespace std;

int main(int argc, char *argv[]) {
double number = 0;

while (number <= 0) {
std::cout << "Gimme a number: ";
try {
std::cin >> number;
}
catch (exception e) {
std::cout << "Oops, you did it again.";
}
}

}
======================================================================
all I get is an endless loop. What exception should I be using and what
header file if not above. Any clues appreciated.

 

[Barry]

I am attempting to use exception handling in the console to trap an
invalid character into a numeric field. Unfortunately, using this example:
======================================================================
#include <exception>

#include <iostream>
using namespace std;

int main(int argc, char *argv[]) {
   double number = 0;

   while (number <= 0) {
     std::cout << "Gimme a number: ";
     try {
       std::cin >> number;
     }
     catch (exception e) {
       std::cout << "Oops, you did it again.";
     }
   }

}

======================================================================
all I get is an endless loop. What exception should I be using and what
header file if not above. Any clues appreciated.

something like this:
http://www.parashift.com/c++-faq-lite/input-output.html#faq-15.5

 

[Ed Dana]

Thanks. That was definitely the clue I needed. (Certainly not the one I
expected.)

 

[Rolf Magnus]

Thanks. That was definitely the clue I needed. (Certainly not the one I
expected.)

Btw, you can use exceptions for this if you like, but you must enabled them
explicitly first.

 

[Ed Dana]

Btw, you can use exceptions for this if you like, but you must enabled them
explicitly first.

Any examples of this would be appreciated.

Ed.