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  1. #include <iostream>
  2. #include <stdexcept>
  3.  
  4. const int LIMIT = 100;
  5.  
  6. class safearray
  7. {
  8. public:
  9.     void putel(int index, int value) { check_index(index); arr[index] = value;}
  10.     int getel(int index) const { check_index(index); return arr[index];}
  11.  
  12. private:
  13.     void check_index(int index) const
  14.     {
  15.         if (index < 0 || LIMIT <= index) {
  16.             throw std::out_of_range("bad index " + std::to_string(index) + " for safearray");
  17.         }
  18.     }
  19. private:
  20.     int arr[LIMIT];
  21. };
  22.  
  23. int main() {
  24.     safearray a;
  25.     const int value = 23456;
  26.  
  27.     for (int index : {7, -1, 101}) {
  28.     	try {
  29.     		a.putel(index, value);
  30.     		std::cout << "value at " << index << " is " << a.getel(index) << std::endl;
  31.     	} catch (const std::exception& e) {
  32.     		std::cout << "Error:" << e.what() << std::endl;
  33.     	}
  34.     }
  35. }
Success #stdin #stdout 0s 3232KB
comments (?)
stdin 
Standard input is empty
stdout 
value at 7 is 23456
Error:bad index -1 for safearray
Error:bad index 101 for safearray
https://ideone.com/rsUMKK
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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