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/************************************************************************
*
* Purpose: Second crack at a lottery number selector.
* Author: M.J. Leslie.
* Date: 03-Dec-94
* Description: Any 6 random numbers from 1 to 49 are displayed.
* Duplicates are removed and the results sorted.
*
************************************************************************/
/********** Preprocessor ***********************************************/
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#define NUMBERS 6
/********** Functions ***************************************************/
void display_nums(int *, int);
int comp_nums(const int *, const int *);
/************************************************************************/
main()
{
int num[NUMBERS]; /* array holding the selected
* numbers */
int count; /* General counter */
printf("\n\nLOTTERY CRACKER V1.1\n");
printf("--------------------\n\n");
printf("\tPossible winning ticket number is ");
/* New starting point
* for the random number generator.
*/
srand((unsigned int)time((time_t *)NULL));
/* Collect Six numbers.
* Filter out duplicats as we go.
*/
{
int dup, count2;
for (count=0; count < NUMBERS; count++)
{
num[count]=(rand()%49)+1; /* Get a number. */
dup=0; /* Set the duplicate flag to
* NO DUPLICATES */
/* Test latest number with the ones
* already held. */
for (count2=0 ; count2 < count; count2++)
{
/* If match found - set flag. */
if (num[count] == num[count2]) dup++ ;
}
/* If flag set - reset the array
* index so we overwrite the current
* number. */
if (dup > 0 ) count--;
}
}
/* Sort the numbers */
qsort(
num, /* Pointer to elements */
NUMBERS, /* Number of elements */
sizeof(int), /* size of one element. */
(void *)comp_nums /* Pointer to comparison function */
);
display_nums(num, NUMBERS); /* Display the results */
}
/************************************************************************
*
* comp_nums: Compare two numbers.
*
************************************************************************/
int comp_nums(const int *num1, const int *num2)
{
return (*num1 - *num2);
}
/************************************************************************
*
* display_nums: Display the numbers
*
************************************************************************/
void display_nums(int *array, int count)
{
/* Print all the elements of
* the array. */
while ( count-- )
{
printf("%d ",*array);
array++;
}
puts("");
puts("");
}
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