/ ************************************************************************ * * 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 * ************************************************************************/
file: /Techref/language/ccpp/Cref/EXAMPLES/qsort1.c, 2KB, , updated: 1997/4/21 09:52, local time: 2024/8/23 08:49,
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