C++ :: Reads User Input And Arrange Letters In Ascending Order?

I am trying to build a c++ that reads user input and arrange letters in ascending order.

for example, if the user input: Hello my name is Moe! the output will be: !aeeehillmmmnoos (ascending order)

my problem is that when i input hello my name is moe the output will be ehllo (not completing other letters) also when i change class size to 50, it outputs unknown weird letters.

This is my code:

#define CLASS_SIZE 10
#include <stdio.h>
#include <iostream>
void bubbleSortAWriteToB(const char a[], char b[]);
using namespace std;
int main(void){
int i;

[Code]...