string 과 iterator을 활용해서 string의 character을 bubblesort 하라는데 


차라리 그냥 배열만쓰면 간단한걸 iterator을 어캐활용하라는건지 잘 모르겠다


20.0pt">Write a program that asks you to input a string and sort characters in the string
font-family:Arial">–The program does NOT know how many characters will be inputted
font-family:Arial">–Use string and iterator

Use bubble sort