C++/STL Basics/out of range exception — различия между версиями
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Текущая версия на 10:24, 25 мая 2010
Access out-of-range element
#include <iostream>
using std::cout;
using std::endl;
#include <vector> // vector class-template definition
#include <algorithm> // copy algorithm
#include <iterator> // ostream_iterator iterator
#include <stdexcept> // out_of_range exception
int main()
{
int array[ 6 ] = { 1, 2, 3, 4, 5, 6 };
std::vector< int > integers( array, array + 6 );
std::ostream_iterator< int > output( cout, " " );
integers.push_back( 2 );
integers.push_back( 3 );
integers.push_back( 4 );
cout << "Vector integers contains: ";
std::copy( integers.begin(), integers.end(), output );
try
{
integers.at( 100 ) = 777;
} catch ( std::out_of_range outOfRange ) // out_of_range exception
{
cout << "\n\nException: " << outOfRange.what();
}
return 0;
}
/*
Vector integers contains: 1 2 3 4 5 6 2 3 4
Exception: vector::_M_range_check
*/
Catch out_of_range exception
#include <iostream>
#include <vector>
#include <exception>
#include <stdexcept> // out_of_range exception
using namespace std;
int main( ) {
char carr[] = {"a", "b", "c", "d", "e"};
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";
} catch(std::out_of_range& e) {
cerr << e.what( ) << "\n";
}
}
Use std::out_of_range Exception for vector
#include <iostream>
using std::cout;
using std::endl;
#include <vector> // vector class-template definition
#include <algorithm> // copy algorithm
#include <iterator> // ostream_iterator iterator
#include <stdexcept> // out_of_range exception
int main()
{
int array[ 6 ] = { 1, 2, 3, 4, 5, 6 };
std::vector< int > integers( array, array + 6 );
std::ostream_iterator< int > output( cout, " " );
integers.push_back( 2 );
integers.push_back( 3 );
integers.push_back( 4 );
cout << "Vector integers contains: ";
std::copy( integers.begin(), integers.end(), output );
try
{
integers.at( 100 ) = 777;
} catch ( std::out_of_range outOfRange ) // out_of_range exception
{
cout << "\n\nException: " << outOfRange.what();
}
return 0;
}
/*
Vector integers contains: 1 2 3 4 5 6 2 3 4
Exception: vector::_M_range_check
*/