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  1. #include <iostream>
  2. #include <map>
  3. #include <string>
  4. #include <utility>
  5. #include <algorithm>
  6. using namespace std;
  7.  
  8. map<string, int> m = {{"hello", 1}, {"world", 2}};
  9.  
  10. class notFound
  11. { };
  12.  
  13. string findFromInt(const int& val)
  14. {
  15. 	map<string,int>::iterator it = m.begin();
  16. 	while(it != m.end())
  17. 	{
  18. 		if(it->second == val)
  19. 			return it->first;
  20.  
  21. 		it++;
  22. 	}
  23. 	throw new notFound();
  24. }
  25.  
  26. int findFromString(const string& str)
  27. {
  28. 	map<string,int>::iterator it = m.begin();
  29. 	while(it != m.end())
  30. 	{
  31. 		if(it->first.compare(str) == 0)
  32. 			return it->second;
  33.  
  34. 		it++;
  35. 	}
  36. 	throw new notFound();
  37. }
  38.  
  39.  
  40. int main() {
  41.  
  42.  
  43.     int findVal = 2;
  44.     try {
  45.     	string str = findFromInt(findVal);
  46.  
  47.     	cout << "found: " << str;
  48.     } catch(notFound *obj) {
  49.     	cout << "Value not found";
  50.     }
  51.  
  52.  
  53.     string findStr = "hgggllo";
  54.     try {
  55.     	int val = findFromString(findStr);
  56.  
  57.     	cout << "found: " << val;
  58.     } catch(notFound *obj) {
  59.     	cout << "Value not found";
  60.     }
  61.  
  62.  
  63.  
  64.  
  65.     return 0;
  66. }
Success #stdin #stdout 0s 3476KB
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stdin
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Standard input is empty
stdout
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found: worldValue not found
https://ideone.com/2FP64h
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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