Write a function that will alphabetize a string without using the sort function :
void alphabetize(string & s) {
}

here is code in C++.

#include <bits/stdc++.h>

using namespace std;

// function to alphabetize the input string

void alphabetize(string &str)

{

// find the length of string

 int n=str.size();

  for(int x=0;x<n;x++){

      for(int y=x+1;y<n;y++)

      {  

          //swap the character

          if(str[x]>str[y]){

              char ch=str[x];

              str[x]=str[y];

              str[y]=ch;

          }

      }

  }

  cout<<"alphabetize string is: "<<str<<endl;;

}

int main()

{// string variable to read input

  string inp;

  cout<<"Please Enter a String in lowercase :";

  //reading the input

  cin>>inp;

  // call function with inp argument

  alphabetize(inp);

  return 0;

  }

Explanation:

Declare a variable "inp" of string type and assign the input string to it. call the alphabetize() function with argument "inp".In the alphabetize(),find the length  of input string.Then travers the string and if a character is greater than any  next character in the string then swap it, so that all the character are sorted.

Output:

Please Enter a String in lowercase :helloworld                                                                                                                

alphabetize string is: dehllloorw