Bounds-checking on vectors - C++ STL

C++ examples for STL:vector

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Description

Bounds-checking on vectors

Demo Code

#include <iostream>
#include <vector>
#include <exception>

using namespace std;

int main() {/*from   w ww.  j  av  a 2s . c om*/

   char carr[] = {'a', 'b', 'c', 'd', 'e'};

   cout << carr[100000] << '\n'; // Whoops, who knows what's going to happen

   vector<char> v;
   v.push_back('a');
   v.push_back('b');
   v.push_back('c');
   v.push_back('d');
   v.push_back('e');

   try {
      cout << v.at(10000) << '\n'; // at checks bounds and throws
   } catch(out_of_range& e) {      // out_of_range if it's invalid
      cerr << e.what() << '\n';
   }
}

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