// **************************************************************
// Scott R. Armstrong
// June, 2003
//
// No error checking is included to avoid errors caused by
// non-numeric or negative input when prompted for a value.
//
// Programming environment:  Borland C++, Version 5.5, Win32
// **************************************************************

#include <stdio.h>      // I/O preprocessor header file
#include <math.h>       // Arithmetic

int main()
{

// declaration of variables
//    bool    prime, repeat;
//    char    ch;
    int     x, y, z, prime, repeat, true, false;

        z = 100000;     // initialized for now - request user input

        true = 1;
        false = 0;

    repeat = true;         // preset the boolean value
    while ( repeat )
    {
      printf("\n");
      printf("Prime Number Calculator\n");
      printf("=======================\n");
        //printf("Enter a positive integer:  "\n);

        // input z here
     
      for ( y = 2; y <= z; y++)
      {
        prime = 1;
        x = 2;
        while ( (x <= y/2 ) && (prime == true) )
        {

          if ((y % x) == 0 )
          {
            prime = false;
          }
          else
          {
            x++;
          }
        }

        if (prime == true)
        {
          printf("%d", y);
          printf(" is a prime number.\n");
        }
      }

        printf("\n");
        printf("Do you want to continue (Y or N)?  ");
//              repeat logic here
                repeat = false; // temp

        if ( !repeat )
            printf("\nQuitting the Prime Number Calculator\n");

    }   // end of while loop

  return (0);
}