string compress(string input)
{  //a function should do one thing well.  So, file I/O should be elsewhere. 
  int ct{};
  string result;  
  char a,b;
  b = input[0];
  for(int i{}; i < input.length();i++)
  {
    a = input[i];
	if(a==b) 
	{
		ct++;
	}
	else 
	{
		result+=b; 
		result +=to_string(ct); 
		ct = 1; 
		b = a;
	}//else		
  }	//for
   //be sure to catch the last char and its count!
   result+=b; 
   result +=to_string(ct); 
  return result;
}
string decompress(string input)
{
  string result;
  char c;
  int n;
  for(int i{}; i < input.length(); i+=2)
	  {
	    c = input[i];
        n = input[i+1]-'0'; //i leave it to you to handle 
		//the problem of getting the int from text when 
		//it is > 9 and figuring out what to do with a number
		//that was compressed like 1122233 compressed to 122332
		//which will break if you have >9 allowed as the count...
		for(int j{}; j < n; j++) result+=c;		  
	  }
	  return result;
}

int main()
{
  string s = "Seek the  allmighty  hoopajoo";	
  string r = compress(s);
  cout << r << endl;
  cout << decompress(r);
}