array sort output problem

okay here is my problem now

if the input is

Code:

penny
henry
george
sammy
vanne

then the output is

Code:

george
henry
penny
sammy

where did vanne go?

my program as of now

Code:

//this program 
//
//program4.cpp
//my name. (im not going to tell you this)

#include <fstream> 
#include <iostream>
#include <string>


using namespace std; // using standard namespace

int main ()
{
	char file[20];
	string str;
	string stri[100];
	int quit =24;
	cout << "enter the name of the input file in the format filename.txt: " ; //user determines the file to write to
	cin >> file;
	cout << endl;
	fstream myfil (file);
    if (myfil.is_open())
	{
		quit=0;
	}
	else quit=1;
	while (quit==1) // keeps the user from trying to write in a close file
    {
	
		cout << "file could not be opened. enter the name of another file in the format filename.txt:" ; //error message
		cin >> file;
		fstream myfil ("example.txt");
		if (myfil.is_open())
		{
			quit=0;
		}
	}

	for (int x=1; x<=100; x++)
	myfil >> stri[x-1];


	bool swap;
	string temp;
	int bottom = 99;     
	do
	{
		swap = false;
		for (int count = 0; count <= bottom; count++)
		{
			if (stri[count][0] > stri[count+1][0])
			{	          
			   temp = stri[count];  
			   stri[count] = stri[count+1];
			   stri[count+1] = temp;
			   swap = true; // indicates that a swap occurred
			}
		}
            bottom--;   
	            
	} while(swap != false);
              // loop repeats until a pass through the array with
	          // no swaps occurs



	cout << "enter the name of the output file in the format filename.txt: " ; //user determines the file to write to
	cin >> file;
	
	ofstream myfile (file);
    if (myfile.is_open())
	{
		quit=0;
	}
	else quit=1;
	while (quit==1) // keeps the user from trying to write in a close file
    {
	
		cout << "file could not be opened. enter the name of another file in the format filename.txt: " ; //error message
		cin >> file;
		ofstream myfile ("example.txt");
		if (myfile.is_open())
		{
			quit=0;
		}
	}

	for (int y =0; y<100; y++)
	
	{
	str = stri[y] ;
	if (str!="")
	myfile <<str << endl;
	
	}
	
	
		
	
		 
	myfile.close();
	myfil.close();// close the file
	return 0;
}

The answer is simple: Buffer overruns.

Changes both <='s to <'s

Also start x at zero, and just use x instead of x-1. Same as your y loop.