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/************************************************************************
*
* Purpose: To sort numbers held in an array.
* Author: M.J.Leslie
* Date: 30-Nov-94
*
************************************************************************/
/********** Preprocessor ***********************************************/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
/********** Functions ***************************************************/
void display_nums(int *, int);
int comp_nums(const int *, const int *);
/********** main ********************************************************/
main()
{
int numbers[]= /* Numbers to be sorted. */
{43,76,23,1,100,56,23,99,33,654};
int how_many=10; /* Number of numbers entered */
puts("\nThese are the unsorted numbers\n");
display_nums(numbers, how_many);
/* SORT the numbers held in
* 'numbers'. */
qsort(
numbers, /* Pointer to elements */
how_many, /* Number of elements */
sizeof(int), /* size of one element. */
(void *)comp_nums /* Pointer to comparison function */
);
puts("\nThese are the sorted numbers\n");
display_nums(numbers, how_many);
}
/************************************************************************
*
* comp_nums: Compare two numbers.
*
************************************************************************/
int comp_nums(const int *num1, const int *num2)
{
if (*num1 < *num2) return -1;
if (*num1 == *num2) return 0;
if (*num1 > *num2) return 1;
}
/************************************************************************
*
* display_nums: Display the numbers
*
************************************************************************/
void display_nums(int *array, int count)
{
/* Print all the elements in
* the array. */
while ( count-- )
{
printf("%d ",*array);
array++;
}
puts("");
}
/******* The Results ****************************************************
*
* These are the unsorted numbers
*
* 43 76 23 1 100 56 23 99 33 654
*
* These are the sorted numbers
*
* 1 23 23 33 43 56 76 99 100 654
*
************************************************************************/
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