# LanguageCcppCref Problems LOTTO2.C

```/ ************************************************************************
*
* 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
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("");
}

```

 file: /Techref/language/ccpp/cref/PROBLEMS/lotto2.c, 2KB, , updated: 1997/4/21 09:53, local time: 2024/8/2 16:57, TOP NEW HELP FIND:  98.81.32.131:LOG IN

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