Question

C++

Answer 1

Answer:

#include <iostream>

#include <map>  

using namespace std;

int main()

{

   map<int, int> numbers;

   cout << "Enter numbers, 0 to finish" << endl;

   int number;

   while (true) {

       cin >> number;

       if (number == 0) break;

       numbers[number]++;

   }

   for (pair<int, int> element : numbers) {

       std::cout << element.first << ": occurs " << element.second << " times" << std::endl;

   }

}

Explanation:

One trick used here is not to keep track of the numbers themselves (since that is not a requirement), but start counting their occurrances right away. An STL map< > is a more suitable construct than a vector< >.