//CSE9B Assignment 3
//Programming Project 3, Chapter 9 
//CSE 9 B Winter 1997 UCSD
//Assignment 3
//This program tests the function delete_repeats.
//You put your name(s), email address, file name, and date last changed.


#include <iostream.h>

const int MAX = 20;

void input_data(char a[], int& size);
//Postcondition: a has been filled with MAX or fewer characters
//read from the keyboard. size is equal to the number of characters read.

void new_line(istream& in_stream);
//Discards all the input remaining on the current input line.

void output_data(const char a[], int size);
//Precondition: a contains size or more elements.
//Postcondition: a[0] through a[size-1] have been written to the screen.
//on one line with no spaces and output has been advanced to the
//next line.


void delete_repeats(char a[], int& size);
//Precondition: a has values for a[0] to a[size - 1]. 
//Postcondition: All repeated values in a have been removed.
//The remaining values have been moved down so they fill
//an initials segment of the array. size has been changed
//to the number of values left.

int main()
{
   char a[MAX];
   int size;
   char ans;
   cout << "This program tests the function delete_repeats.\n"
        << "Be sure to test an array with zero elements,\n"
        << "one with only one element, a long array with\n"
        << "all the same letter, and lots of other cases."
        << endl << endl;
   do
   {
       input_data(a, size);
       cout << "Before deletes array contains:\n";
       output_data(a, size);
       cout << "size = " << size << endl; 
       delete_repeats(a, size);
       cout << "After deletes array contains:\n";
       output_data(a, size);
       cout << "size = " << size << endl; 
       cout << "Test again?(y/n)";
       cin >> ans;
       new_line(cin);
    }while ((ans != 'n') && (ans != 'N'));
}

//Uses iostream.h:
void new_line(istream& in_stream)
{
char symbol;
    do
    {
        in_stream.get(symbol);
    } while (symbol != '\n');
}