exception out of range c

1
2#include <iostream>      
3#include <stdexcept>      
4#include <vector>        
5
6int main (void) {
7  std::vector<int> myvector(10);
8  try {
9    myvector.at(20)=100;      // vector::at throws an out-of-range
10  }
11  catch (const std::out_of_range& oor) {
12    std::cerr << "Out of Range error: " << oor.what() << '\n';
13  }
14  return 0;
15}

1Defines a type of object to be thrown as exception. 
2It reports errors that are consequence of attempt to access elements out of
3defined range.
4
5It may be thrown by the member functions of std::bitset and std::basic_string,
6by std::stoi and std::stod families of functions,
7and by the bounds-checked member access functions
8(e.g. std::vector::at and std::map::at).

1class out_of_range : public logic_error {
2public:
3  explicit out_of_range (const string& what_arg);
4};
5
6EX.
7
8// out_of_range example
9#include <iostream>       // std::cerr
10#include <stdexcept>      // std::out_of_range
11#include <vector>         // std::vector
12
13int main (void) {
14  std::vector<int> myvector(10);
15  try {
16    myvector.at(20)=100;      // vector::at throws an out-of-range
17  }
18  catch (const std::out_of_range& oor) {
19    std::cerr << "Out of Range error: " << oor.what() << '\n';
20  }
21  return 0;
22}

1Replace throw std::out_of_range; with throw std::out_of_range ("blah");. I.e. you need to create an object, you cannot throw a type.