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  1. #include <cctype>
  2. #include <iostream>
  3. #include <map>
  4. #include <sstream>
  5. #include <string>
  6. #include <vector>
  7.  
  8. int main(int argc, char** argv)
  9. {
  10.     std::vector<int> nums;
  11.     nums.push_back(5789);
  12.     nums.push_back(-9876);
  13.     nums.push_back(12345);
  14.     nums.push_back(56789);
  15.     nums.push_back(56788);
  16.     nums.push_back(-1111);
  17.  
  18.     std::map<char, int> digit_frequency;
  19.  
  20.     for(int i = 0; i < nums.size(); ++i)
  21.     {
  22.         std::stringstream ss;
  23.         ss << nums[i];
  24.         std::string str = ss.str();
  25.         if(isdigit(str[0]))
  26.         {
  27.             ++digit_frequency[str[0]];
  28.         }
  29.         else if(isdigit(str[1]))
  30.         {
  31.             ++digit_frequency[str[1]];
  32.         }
  33.     }
  34.  
  35.     std::map<char, int>::iterator it;
  36.     for(it = digit_frequency.begin(); it != digit_frequency.end(); ++it)
  37.     {
  38.         std::cout << "Number " << it->first << " occurred " << it->second << " time(s).\n";
  39.     }
  40.  
  41.     return 0;
  42. }
Success #stdin #stdout 0s 3436KB
comments (?)
stdin
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Standard input is empty
stdout
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Number 1 occurred 2 time(s).
Number 5 occurred 3 time(s).
Number 9 occurred 1 time(s).
https://ideone.com/0l9oks
language:
C++ (gcc 8.3)
created:
10 years ago
visibility:
public

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