Algorithm

Sort the string and print the consecutive elements count.
Now, print the occurrences of every consecutive element.

Code

#include <iostream>
#include <algorithm>
using namespace std;
class Solution{
// Function to print frequency of each character in the sorted string
void Printfrequency(string str)
{
  // Sort the string in increasing order
  sort(str.begin(), str.end());

  char ch = str[0]; // Start with the first character
  int count = 1;    // Initialize count of current character

  // Loop through the rest of the string
  for (int i = 1; i < str.length(); i++)
  {
    if (str[i] == ch)  // If same as previous character, increase count
      count++;
    else
    {
      // Print the character and its count
      cout << ch << count << " ";

      // Reset for new character
      count = 1;
      ch = str[i];
    }
  }

  // Print the count for the last character
  cout << ch << count << " ";
}

int main()
{
  string str = "takeuforward"; // Input string
  Printfrequency(str);         // Call function to print character frequencies
  return 0;
}